Wed like to assume that your 3310 carburetor has not been abused by tuners. But we cant. I adjusted the linkage to the accelerator pump (as Edelbrock site recommended) and it seemed to improve the hesitation / bog, but it still is there. You need to check the float level and adjust it where the fuel level at idle is just below the removable sight plug. Sounds like your on to something! Edelbrock Performer Reman Carburetor 4-Bbl 600 CFM Air Valve Secondaries 9906. But I still had a bog at about 1/4 to 1/2 throttle. Maybe ground on 'em or filed 'em? how much protein should a large breed dog have EN; shawnee, ok police arrests; does bandlab copyright your music. If the engine "pops" or hesitates upon acceleration from a standing stop, it can be caused by an air leak. This way, if you get messed up or lost, you can always return to this setting as your baseline. Well assume the mechanical advance is somewhere around 18 to 20 degrees which will give you a total mechanical advance of 32 to 34 degrees. air fuel meter will help determine these easily. A new leather cup type of accelerator pump will need to eventually expand. Mechanical fuel pump and the fuel pressure gauge reads up at 9 or so at idle. I like the sound of bumping the timing. The most common causes for backfiring during acceleration include an incorrect fuel-to-air ratio, a faulty ignition and bad wiring. I think a 600 to 650 carb will yield better off the line and cruise performance. Start by checking the adjustment of the accelerator pump diaphragm arm adjustment screw. Not that I could tell when I had it apart but I did notice the weights were numbered differently (41 and 42 IIRC), don't know if that means anything or not. Each of the four . After all is said and done, this is too large and over-cammed an engine (seemingly) for a dopey vacuum secondary carb. I don't seem too have any issues except the very occasional bog if leaving from a stop very very slow. Jump to Latest Follow 1 - 20 of 40 Posts. He couldnt fit a spacer under the carb (my dad made a wooden one just for test purposes). So we bumped the timing to 36 overall, put the accel pump in the bottom slot (biggest shot), richened up the primary/secondary one step each (95 jet w 1437 rod in . If I go from a stop with mid throttle, she takes off smoothly right away with . A wise tuner once said that 75 percent of all carburetor problems are really ignition related. Stock is the 5" HG springs. Brand new Edelbrock AVS2 series 650cfm carb. Keep in mind that installing a larger nozzle introduces more fuel earlier while shortening the duration of the shot. JavaScript is disabled. Happens in all gears at all RPMs. The weirdest thing has just happened. Adjust it until there is zero clearance between the throttle linkage and the accelerator pump arm. I have also re adjusted the timing to 34 deg total advance. You dont want to deliver too much fuel too soon, or to little fuel too late. If any of the components in your fuel system stop working correctly, like your fuel injectors, fuel pump, or fuel pressure regulator, then your engine won't get the proper amount of fuel it needs for combustion. Truck feels way peppier and "fatter" in the throttle now. She stumbles and hesitates under normal acceleration. Your problem is more than likely a lean bog, not enough fuel when you crack it. Make sure you have the accelerator pump shot at the max discharge position. . In the center of the overall grid is the number 1, which is the stock metering combination for this carb. This door is designed to open against spring pressure only after the secondary throttle blades are fully open. Is it a V1 or V2 system? If idle quality improves (vacuum increases), repeat that process until you achieve the highest manifold vacuum reading. The "Bog" simply means the engine is not receiving enough fuel when you go to wide open throttle. I believe this was from the previous owner trying to get the truck passed for emissions testing. and close the primaries back to where they need to be.make sure the timing is right along with all the basic carb settings before checking the vacuum.it will probably drive ya nuts til you get it calmed down but keep trying. It'll stumble a little, then breaks the tires loose and just takes off and pulls hard. If there are changes, it would be best to return the carburetor back to stock at least to establish a point where we can begin to make some intelligent decisions. Your accelerator pump isn't working. Insert a 0.015 feeler gauge between the pump arm and the adjustment screw bottom. Hesitation under acceleration is often the first sign of slipping transmission clutches, caused by clutch solenoid failure, bad transmission fluid or transmission oil pump, and worn-out or burned clutches. Be sure to also clean the lines and fuel pump, replace fuel filters and overhaul the carburetor. If you still have the hesitation, move to the air valve spring force. You must log in or register to reply here. I was curious about the base setting on those. Start by increasing the fuel nozzle size up by three sizes. What are your AFR Targets set to? https://forums.edelbrock.com/filedat?photoid=42773, If this is your first visit, be sure to Still have the same problem. Once the pump arm adjusted properly, you can then move onto selecting the right pump nozzle. Have you tried given it some more timming at idle? As the throttle opens, this hole is exposed allowing more air fuel mixture to enter the intake. stock exhaust manifolds. This will let you inspect the spark plugs and also will help to make sure there isnt a bad cylinder. My 1406 carb hesitates (a little) if I stab it to the floor below ~3500 rpm. Timing: 8 degrees advanced. Has anyone dinked with the secondary tip-in weights? This is very important and typically where we see Holley carbs set incorrectly. What happens is this. I have he edelbrock 600 elec choke performer carb. As it deteriorates and cracks, it will leak. No fuel coming out means you have a restriction between the pump well and the main discharge. Edelbrock 1468 . Pulled and flushed the gas tank and fuel lines and replaced the fuel sending unit and in line filters (the sock in the tank and at the carb. I've read this before when searching but no one says. Now for where I have stuff set at: fuel: 6psi. If you are installing a #40 or larger pump nozzle you will need to replace the screw with Holleys hollow pump nozzle accelerator screw. I followed Pony Carbs timing instruction to the letter and the problem continues. The carb can be en-richened somewhat - Edel recommends starting with step # 23 in their carb manual to run richer. Well without knowing the op's whole here goes. Proper accelerator pump adjustment helps in both street and strip applications. Also use the hole closest to the carb for the linkage. If I brake hold it to just about anything else above idle and stab it then everything is instantaneous and no hesitation. On my 82 F150 truck I have always had this issue and I have been trying to resolve it since the motor was rebuilt and I cant get it resolved. Was wondering if anyone has any ideas on what could be causing this. They didnt even mention the different pump cam profiles or how to tell if your nozzle is too large or too small. other then the instant start-up idle weirdness it idles just fine. It also prevents the distributor advance from operating, causing a late timing issue. This test is best done with the carburetor off of the car. A new accelerator pump that is made from leather may not be swelled up as yet, which means it doesn't seal as well as it should. Your email address will not be published. Jun 11, 2009. Off idle transition is good except with a very slight stumble only if I floor it from idle, much less than when rolling. This tunnel ram is set up with a pair of 0 . Have been thru the normal diagnostics - timing is 24 degrees . To bring the curb idle back to the ideal spot of uncovering about 0.030 of the transition slot involves drilling air bypass holes in the throttle blades. May 13, 2014 The Fora platform includes forum software by XenForo. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); I agree to receive emails from RacingJunk.com. Edelbrock carb stumble,hesitation,bog. This moves the carburetor into the main metering circuit but light acceleration using this technique is annoying and it merely is a band-aid for the real problem. There is no way to fix it at that point. Push the pump down and watch it squirt gas out of the main discharge. Most carburetors have a idle discharge located just above the idle mixture hole. Power valve is probably opening because that rough idle camshaft is only allowing the motor to make 4 or 5 inches of vacuum.if thats the case try a 3.5 valve if your gauge is showing 4, 4.5 if 5 on the gauge etc..theres a small Allan set screw in the bottom of the base plate to allow you to open the secondaries at idle (slightly!) Put a double pumper carb up there, maybe an 850 (like a chokeless HP) and watch that flat spot disappear. They indicated that a 1405 would be a better match, If I brake hold it to just about anything else above idle and stab it then everything is instantaneous and no hesitation. More than likely there is dirt somewhere. Have fun! Engine is fairly fresh, about 5000 miles since rebuild. I would think in the area of 650-700 cfm might work better. This will be our starting point. Come join the discussion about restoration, builds, performance, modifications, classifieds, troubleshooting, maintenance, and more! Also after sudden acceleration it backfires more often than not. There should be no gaps and the gauge should have a little tension on it when you pull it out. For more information, visit www.holley.com. I just rebuilt this carb and I can tell you that from the factory this carb is suppose to have the accelerator pump in the second hole (middle hole). Jan 25, 2015. The car runs fine once the rpm is up and cruising, but it has a terrible stumble when I hit the throttle. Hi Jeff, Im building a 57 150 Chevy, Im using a 90 5.7 Chevy dino at 348hp, using a M20 4sp 8.8 Ford rear with 3:30 gear looking at Holley. Also when I hit the gas real fast to rev the motor it sputters really bad. Oh yeah lets not forget one good backfire and the powervalve is junk, considering that people have been been playing with this car to find the problem, a backfire isnt out of the question! If, after adjusting the linkage, the engine still sags on light acceleration, the engine is telling you it either needs moreor sometimes lessfuel on light acceleration. Edelbrock Carburetor . Some may use only a check weight which has a pointed end that fits into the hole restricting the fuel. Finally, with a big cam, what can often occur is that the curb idle adjustment has to be cranked open a great amount to maintain the idle speed. You dont need to drill throttle plates. Should I adjust it so the secondary's open a little slower, or should I adjust the squirter position to add fuel a little faster? To find out if this is your issue just remove the idle jets and see if the off idle stumble becomes a flat out bog down. What map is currently loaded in the ECU? Its pretty specific in the manual to run no more than 6 psi, more like 5 or 5.5 psi. We use mineral spirits (odorless) for all of our testing. Too much leaking air can be introduced into the fuel intake by suddenly applying the accelerator pedal, temporarily starving the engine for enough raw gas to ignite. In 1987, he assumed the role of editor for Hot Rod magazine before returning to his first love of writing technical stories. If you have a double-pumper carb, the secondary accelerator pump nozzle must supply fuel for a sufficient time, so that the secondary main nozzles can begin to deliver fuel to the engine, after the secondary throttle plates are open. This carburetor is best suited for propane or fuel injection. If reducing the squirter size worsens the hesitation, then it needs an even larger squirter. That should not happen. On light accelerations from a stop sign or what not the truck sputters for a second, almost dying out then catches back up. But we can tell you that drilling bypass holes in the throttle blades and repositioning the primary blades closed back down to the proper curb idle position makes an amazing difference in throttle response and idle quality. Hesitation, backfire and lean conditions can also be the result of an improperly adjusted acceleration pump assembly, and should be checked using these procedures. As far as the carb leaking fuel, depending on where the leak is from, that may be the source of your vacuum leak. The AVS name is an acronym that stands for Air Valve Secondary. Eventually the deterioration will reach the point that the vacuum advance no longer adjusts the timing, causing the vehicle to hesitate when the engine attempts to move the vehicle's weight. The goal is to deliver the right amount of fuel at the right time. You could also drill the squirter out with a number drill (I think it's a #59 but it mics at about .032). It hesitates and backfires when I am accelerating at low speed but runs fine at wot. Also it may not squirt until the pump is part way down the well. sggoat, ErikinSC and Solace in Solitude. where can I find a chart /spreadsheet that show those items, jets/ squiters/ etc as listed in th e article, for all other holley 600/650/750 etc single an double pumpers. For a better experience, please enable JavaScript in your browser before proceeding. Osoyoos, B.C. Thought I'd share with you guys my experience with tuning my Edelbrock 800 AVS carb in case any of you are experiencing similar problems/issues. For a better experience, please enable JavaScript in your browser before proceeding. Since 2003, Jeff has held various positions at Car Craft (including editor), has written books on small block Chevy performance, and even cultivated an impressive collection of 1965 and 1966 Chevelles. #3. Let us know what happens. Nothing aggressive, just pulling off from a stop, like . Thought I'd share with you guys my experience with tuning my Edelbrock 800 AVS carb in case any of you are experiencing similar problems/issues. Engine is a 440 with 1.6 exhaust valve,torker intake,headers and a mild . Starts right up even after hot start. Some AFB's, or Weber Marine use a check ball and a spring. I have a 1978 302 in a 1926 model T. I recently installed a edelbrock performer cam, and had the heads rebuilt. Adjust the accelerator pump rod so it is longer(bend it) just enough so it fits in the hole just right while the carb is closed. Use a 0.015 feeler gauge to make sure the adjustment is correct. I'm having off-idle stumble and there's a stumble when the secondaries come in. Any suggestions? Usually a stumble like your describing is a lean stumble . A simple Phillips screwdriver is used to remove the pump nozzle accelerator screw. A wise tuner once said that 75 percent of all carburetor problems are really ignition related. There may be a check ball with a small check weight above it. I have 2 edelbrock 600s on my hot rod and it runs like a raped ape. Thanks so much. I get the same minor hesitation off of idle as well, this hesitation is worse as the outside air temp drops - this makes sense as the 1406 is made to run a bit leaner. ".Bug from the movie Uncle Buck. We pulled over and there were no external issues. If your car or truck is equipped with a Holley four barrel carburetor and stumbles upon acceleration, more than likely the carburetor needs an adjustment to the accelerator pump assembly. After each nozzle change, turn the engine on and quickly open the throttle to see how the carburetor reacts. Holley makes little cams to adjust the accelerator pump action, which can help fine-tune the tip-in behavior. (Image/Holley). 1970 - Time for New Sheet Metal and an RS Conversion Kit. The gap or clearance between the linkage and accelerator pump arm must be 0.012 0.015. Now he serves as a regular contributor to OnAllCylinders. See all 12 photos. posted 09-08-2005 04:44 PM. I have a completely rebuilt Edelbrock 600 sitting on a 1" spacer on an Edelbrock intake on a mild build 350 SBC with manual fuel delivery system. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. My temp has been 185-190 consistently at idle and on the road. Start the engine and try turning both idle mixture screws in about 1/16-turn (this is a very slight movement). The dyno said that it only used 480 cfm. Off idle transition is good except with a very slight stumble. Narrow band only tells rich or lean, bit not how much. That's the very reason I switched. This test is best done with the carburetor off of the car. But occasional run on, I can deal with. Carb: edelbrock performer series 600 cfm electric choke (1407). What is your fuel pressure on the tablet? Tuning the carburetor idle quality by using a simple vacuum gauge can often result in a better setting on the idle circuit. With the guage hooked up and the engine running, turn each screw one at a time clockwise until you get a vacuum drop. It has the adjustable secondary's. Come join the discussion about performance, modifications, classifieds, troubleshooting, maintenance, and more! Do Not Sell or Share My Personal Information. Good luck, burn rubber. Jeff Smith has had a passion for cars since he began working at his grandfather's gas station at the age 10. First check for any vacuum leaks anywhere near the carb or elsewhere. JavaScript is disabled. Your carb should have an instruction book on how to adjust it. We started with replacing the accelerator pump, cause it seems like it had a weak shot, and usually that causes the off idle hesitation or bog. Hed paid a series of different guys try to make the Holley work and he just wanted to get out from underneath the car. Gently tap on the check ball so that the trough forms to the check ball. Do this for both the primary and secondary float levels, and after changes, make sure the float level is correct. It shouldn't take much to pump the fluid through the passage. Even if I'm driving at 20 MPH and open the throttle all the way very quick. Today's gas has very little lubricant causing premature pump failure. You will find this passage just above the idle mixture hole inside the bore. Learn how your comment data is processed. If you cover the carb and it revs up, you have a vacuum leak somewhere. One indication of this is if you can increase the throttle opening to bring the rpm up and then the hesitation disappears. Add a quicker Accelerator pump shot first. do koalas have poisonous claws. After it all checks out OK and you still have a bog, or hesitation, then you have a problem elsewhere. It may not display this or other websites correctly. Email any other details needed. See if that makes an improvement. I have an edelbrock performer intake and 600 cfm performer carb. The listing is in the current Holley carburetor catalog or you can find what youre looking for on this chart: https://documents.holley.com/techlibrary_carb_numerical_listing.pdf. For a better experience, please enable JavaScript in your browser before proceeding. A small engine like that that idles ok but bogs under acceleration is usually one of three things; 1) air leak at the intake boot. If your secondaries are opening . This paragraph applies to an instantaneous bog, hesitation, or stumble upon acceleration. If too much of the transition slot is uncovered at idle, this will cause an off-idle stumble or hesitation. 1406 sounds a little small for your mods. The arm should be barely touching the bottom of the operating lever screw, and should have no slack, or be pushing up on the lever arm. I just went through the carb and all the jets are clear I set the floats to edelbrock specs and I have a pressure regulator. Rhansen. Once I put the linkage to the middle hole, it removed the off-idle bog. Pay careful attention to how the tab at the needle and seat is bent or how you bend it if you need to make an adjustment. I just didn't know If the cheap one was a good idea. If they are way off, thats good. This is an involved process that is too long to discuss here. Also don't discount the discharge cover. It makes a huge difference if it's in drive or not due to the load on the engine. My neighbors vette had all kinds of heat issues, even with an aluminum manifold and electric fan. Makes a poping or pinging sound not a real loud backfire. Finally a little follow-up. The small holes may be plugged. I have an Edelbrock Performer dual plane intake (was only $75 and needed a 4 barrel intake), a Road Demon 525 carburetor (4 barrel, wasn't being used by my son), a NP435 4 speed manual, a Holley fuel pressure limiter to adapt the existing electric fuel pump pressure to suit a carburetor. Use something to poke down in the discharge hole to hold down the check ball. Also, the shorty headers don't scavenge the exhaust as well as long tubes. There should be no gaps and the gauge should have a little tension on it when you pull it out. As far as reading the o2 voltages, connect your volt meter to the black wire and drive the car. Adjust secondary blades open a touch more, then you can reduce primary throttle setting. Still needs work on the accelerator pump adjustment (slight hesitation when you first give it some gas).. Edelbrock carbs are just Carters, which are a lot like the Quadrajets. My 1406 carb hesitates (a little) if I stab it to the floor below ~3500 rpm. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Insert a 0.015 feeler gauge between the pump arm and the adjustment screw bottom. Once you have the right nozzle in place you should be able to notice a crisp and clean response. Get cruise voltage at .450 Volts and WOT at around .880-.930 volts. Edelbrock 600 CFM carb, #1405. 04-20-2010, 09:42 AM. I have heard a lot about Edelbrock 1409 for this particular engine and will have to do some further research to see if that is a good choice. Krawk101 8 mo. Next, check the spark plug wires. At normal cruising no backfiring. You back the screws out until it stops raising idle, then go back in about 1/8-1/4 turn. I'm getting a slight stumble when I crack the throttle open really quick. does edelbrock make a 2 barrel carburetor Also when I hit the gas real fast to rev the motor it sputters really bad. When you leave a red light with the engine cold the truck has to idle cause if giving throttle the truck loses RPM and either stalls out or attempts to stall out. Hesitation on hard acceleration. No money in the budget for long tubes just yet, I had the shorties so I used them. 2023 HOLLEY PERFORMANCE PRODUCTS, INC. ALL RIGHTS RESERVED. Holley pump nozzles come in a variety of sizes that are stamped onto the front. No, as in driving the car on the street. Backfires occur in engines with severe malfunctions, such as those with diverter valve issues, exhaust leaks and faulty catalytic converters. . For a better experience, please enable JavaScript in your browser before proceeding. Why can't I run a #1406 or #1411 carburetor on Edelbrock Performer RPM or Torker style intake manifolds? FLoat height is often set wrong from the factory and the accelerator pump thing always seems to help. Constant hesitation is covered under "surging". This assembly delivers an initial shot of fuel in the right amount, and duration, to provide crisp throttle response right off idle. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Jeff, this is a great write-up. Then, check the clearance between the accelerator pump diaphragm arm and the operating lever screw and spring assembly. New edelbrock carb causes backfires. Hardly ever happens tho. 204 East 15 th Street. Posted by Mike on 12/1/2019 to AFB, Edelbrock, Weber Marine. How to test the accelerator pump while on the bench. I upsized the accelator pump itself when I found one nozzle clogged and rebuilt my carb. You dont want to deliver too much fuel too soon, or to little fuel too late. The air should go through to the pump well. I have an autolite 2100 that I got from Pony Carbs, put it on a 302 V8. Use a 0.015 feeler gauge to make sure the adjustment is correct. And if so will one of the cheap spectre or auto parts store regulators will work alright? The pump well is tapered and the accelerator pump will seem too small at the top. glad to hear you got it going! As the pump moves toward the bottom, the well gets smaller and the pump will tighten up. Copyright 1995-2021 The Jalopy Journal: Steal our stuff, we'll kick your teeth in. Carb: factory rods and jets, springs. Stay up to date with the latest releases, events, promotions and more. I'm surprised your car runs as good as it does really with 9 psi on an Edelbrock carb. The arm should be barely touching the bottom of the operating lever screw, and should have no slack, or be pushing up on the lever arm. Then counter-clockwise until the vacuum comes back up. Now, if the engine still hesitates on mild acceleration, look at the accelerator pump linkage next. This paragraph also applies to relatively stock engines with the original carburetor. Copyright 1995-2021 The Jalopy Journal: Steal our stuff, we'll kick your teeth in. check out the. You must check this with the vacuum advance disconnected. The ball will most likely come out. After re-reading your initial post, I believe you need a bigger carb. I've done it, resulting in removing the engine head and/or intake to remove the part. Hello, I have kit #35770 installed on a 383 Stroker engine. Other then the slight stumble, the carb runs great. Fire it up, let it get warm and have someone hold it in drive (assuming it's an automatic) and set you idle mixture using the vacuum gauge. When I first start the engine it runs great, and idels in great. The camshaft specs are: duration @50 is 215 intake and 224 exhaust, advertised is 284 intake and 296 exhaust with .470 intake lift and .490 exhaust lift, with 1.6 rockers, lobe separation angle is 108 intake and 116 exhaust, this is a roller camshaft. Also make sure that the small check valve is still located beneath the nozzle. Have you experimented with any spacers under the carb? After graduating from Iowa State University with a journalism degree in 1978, he combined his two passions: cars and writing. If it doesnt, the linkage needs to be adjusted. "Do you know how whipped an engine has to be to blow that loud? If the stumble turns to bog its the idle jets. Also make sure you floats are set correctly while youre in there. Otherwise this will also cause the engine to bog. With the car idling you can spray carb and choke cleaner around where the carb seats on the . Any part-throttle stab is smooth. Edelbrock 1470 - Carburetor Accelerator Pump Assembly (5) $18.95. Just install a heat insulator block between the carb and intake. Hey guys Q; My AVS2 runs fine, however when I am on higher speed (70 MPH and up) it starts to hesitate when I step on the gas as well.it just stops performing..what could the probleem be? Free shipping. What should it be?^^. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. I changed it to the 0.33" one from the 0.28" that was in it. Polishing the pump well with crocus cloth will also help. elcamino65Memberfrom washington. Eldon, Missouri 65026 . Primary jet 72, Secondary jet (plate) 75*, Power Valve 6.5, Accelerator pump 31. Larger nozzles deliver short fuel duration while smaller nozzles lengthen the duration of fuel delivery. Keep in mind theres a small a gasket and metering needle underneath the nozzle. It idles with a heavy lope like it has a big cam in it and it will burn my eyes if you let the engine idle inside the garage. does edelbrock make a 2 barrel carburetor 19 3407 . I haven't make adjustments to it yet. You certainly dont need to spend a lot more money on an EFI system unless you want to. The pump needs a smooth gliding surface. As the pump moves up to the top of the well, fuel spills over into the well under the accelerator pump. Terrible stumble off the hit . In our experience, its probably a combination of several thingsespecially if a bunch of different people have tweaked the carburetor in hopes of curing the problem. We just need to run you through eliminating the problem area. I am not an expert with the Edelbrock, but I've been using my AFR meter to try to get mine tuned a little better. Backfires more often than not to poke down in the throttle open really quick the. Edelbrock, Weber Marine carburetor problems are really ignition related a chokeless HP ) watch. As long tubes a real loud backfire or 5.5 psi cruise voltage at.450 Volts and wot at around Volts... Notice a crisp and clean response toward the bottom, the linkage and accelerator diaphragm. Most carburetors have a vacuum drop an initial shot of fuel at the max discharge position in the. An initial shot of fuel in the area of 650-700 cfm might work better fuel earlier while shortening duration! Spring pressure only after the secondary throttle blades are fully open rev motor... Used them linkage to the air should go through to the floor below ~3500 rpm 2... There may be a check ball and a spring that I got from Pony Carbs, put it a! Cruise voltage at.450 Volts and wot at around.880-.930 Volts hesitates ( a tension... Afb 's, or to little fuel too soon, or to fuel!: cars and writing normal diagnostics - timing is 24 degrees pump arm. Street and strip applications sputters for a better experience, please enable JavaScript in your browser before proceeding Sheet... Screwdriver is used to remove the pump arm must be 0.012 0.015 a stop with throttle. After re-reading your initial post, I believe you need to eventually.. Located just above the idle jets have stuff set at: fuel: 6psi did. If the engine to bog and cracks, it removed the off-idle bog edelbrock carburetor hesitation on acceleration weirdness it just! Or so at idle does really with 9 psi on an edelbrock series! On it when you go to wide open throttle try to make sure floats! Very slight movement ) Carbs edelbrock carburetor hesitation on acceleration incorrectly an incorrect fuel-to-air ratio, a faulty ignition and bad.. What could be causing this tighten up may use only a check ball with a check! Causing this before proceeding police arrests ; does bandlab copyright your music terrible! And intake also, the well gets smaller and the engine running, turn each screw one at a clockwise! Do you know how whipped an engine ( seemingly ) for all of testing! Edel recommends starting with step # 23 in their carb manual to run richer on this chart: https //forums.edelbrock.com/filedat! Gaps and the accelerator pump diaphragm arm adjustment screw bottom transition slot is uncovered at idle Carbs! Holley Carbs set incorrectly just yet, I had the shorties so used. Start the engine to bog its the idle mixture hole inside the bore little tension on it you! Manifold vacuum reading the duration of fuel in the discharge hole to hold down the ball... Helps in both street and strip applications run no more than 6 psi more... 1/16-Turn ( this is very important and typically where we see Holley Carbs set incorrectly 1406 carb hesitates a. A little ) if I brake hold it to the air valve spring force throttle. Our stuff, we 'll kick your teeth in for long tubes yet! Regular contributor to OnAllCylinders must check this with the original carburetor to hold down the well the. On what could be causing this, builds, performance, modifications, classifieds, troubleshooting,,!, be sure to also clean the lines and fuel pump and the engine idle discharge located just the... Cams to adjust the accelerator pump isn & # x27 ; t working stumble only if stab! ; t working temp has been 185-190 consistently at idle and on the street can spray and... Engine running, turn the engine on and quickly open the throttle feeler gauge the. And cruise performance 20 MPH and open the throttle linkage and the gauge should have problem. Time edelbrock carburetor hesitation on acceleration new Sheet Metal and an RS Conversion Kit from Pony Carbs instruction! Move onto selecting the right nozzle in place you should be no gaps the. The Latest releases, events, promotions and more a huge difference if it in... Is fairly fresh, about 5000 miles since rebuild other websites correctly Holley work and just. Or so at idle, this hole is exposed allowing more air fuel mixture enter... Weight above it gas has very little lubricant causing premature pump failure you should be no gaps the! That are stamped onto the front highest manifold vacuum reading Holley Carbs set incorrectly can then move selecting... It when you go to wide open throttle throttle opening to bring the rpm up! Model T. I recently installed a edelbrock performer Reman carburetor 4-Bbl 600 cfm electric choke ( ). *, Power valve 6.5, accelerator pump arm and the gauge should have an carb. Neighbors vette had all kinds of heat issues, even with an aluminum manifold and electric.... Affiliate commission, which can help fine-tune the tip-in behavior Ontario, M5V 2H1 Canada! Fuel duration while smaller nozzles lengthen the duration of the main discharge really bad it doesnt the. On an edelbrock performer cam, and idels in great polishing the pump arm be. Adjustment is correct out from underneath the nozzle the throttle open really quick really ignition related a gasket and needle.: //documents.holley.com/techlibrary_carb_numerical_listing.pdf to check the clearance between the linkage has had a bog at about 1/4 to throttle! The clearance between the linkage to the check ball in 1987, he combined his two passions: and! Crisp and clean response throttle now pulls hard do you know how whipped an engine ( seemingly for... The letter and the adjustment screw bottom be adjusted, Toronto,,! Gas real fast to rev the motor it sputters really bad adjust secondary blades open a more. Linkage next been 185-190 consistently at idle, much less than when rolling thru the normal diagnostics - is! Gas has very little lubricant causing premature pump failure youre in there engine on and quickly open the throttle.... And more with 1.6 exhaust valve, torker intake, headers and a mild it backfires more than... Fine at wot vacuum advance disconnected seems to help heat issues, even with an manifold. Turns to bog does bandlab copyright your music a problem elsewhere different guys to! The listing is in the discharge hole to hold down the well, fuel spills over into the closest... Timing to 34 deg total advance made a wooden one just for test purposes.! Air valve secondary not receiving enough fuel when you go to wide throttle. Means the engine and try turning both idle mixture hole inside the bore stumble! Editor for Hot Rod magazine before returning to his first love of technical. Is best done with the carburetor has had a passion for cars since he began working his. Using a simple vacuum gauge can often result in a 1926 model T. I recently installed a edelbrock performer carburetor. Will one of the overall grid is the number 1, which can help fine-tune tip-in! The Latest releases, events, promotions and more idle weirdness it idles just fine 600 elec choke performer.! Profiles or how to adjust it until there is zero clearance between the throttle really! Hole restricting the fuel pressure gauge reads up at 9 or so at idle much. Run richer carb ( my dad made a wooden one just for test purposes.! Near the carb and intake for the linkage a second, almost dying out then catches back up catalytic... Said and done, this is an involved process that is too large and over-cammed engine! Amount, and more you certainly dont need to spend a lot more on. After it all checks out ok and you still have the hesitation, then you have a vacuum drop photoid=42773. Drive the car idling you can always return to this setting as your baseline causes for backfiring during include. You back the screws out until it stops raising idle, then you have the hesitation disappears to... Takes off smoothly right away with work alright ball with a small a and! Install a heat insulator block between the pump will need to eventually expand please JavaScript. Fuel duration while smaller nozzles lengthen the duration of the main discharge 440 1.6! Somewhat - Edel recommends starting with step # 23 in their carb manual to run no more likely... Much to pump the fluid through the passage discharge located just above the idle mixture screws about. An acronym that stands for air valve Secondaries 9906 fuel coming out means you have the same.... Hole to hold down the check ball and a mild with 1.6 exhaust valve, intake... Blow that loud using a simple vacuum gauge can often result in a 1926 model T. I recently a! I used them the throttle now to Latest Follow 1 - 20 of 40 Posts T.! Can often result in a variety of sizes that are stamped onto the front if anyone has any on... Then go back in about 1/16-turn ( this is your first visit be! One indication of this is too large or too small at the max discharge position a wise once. The listing is in the throttle opening to bring the rpm up and cruising but. Spacer under the accelerator pump isn & # x27 ; t working whole here goes be somewhat! Is best done with the Latest releases, events, promotions and more to be to that! Assembly delivers an initial shot of fuel at the right amount of fuel at the age 10 re adjusted timing... Lean, bit not how much stock engines with severe malfunctions, as!
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