This page was generated at 01:20 PM. loss of power and hesitation when accelerating. Installed a new 1406 on my 63 Avanti. 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. Is it a V1 or V2 system? Just install a heat insulator block between the carb and intake. Following up on my other replies in this thread, I took the car out for the first time since I removed, disassembled and cleaned the 1406. 2, Cure The Bog And Sluggish Response On Your Holley Four-Barrel Carburetor By Properly Adjusting The Accelerator Pump Assembly. I went down to the pink (7" HG) spring but I think the silver performed a little better and jsut put them back in. 2023 HOLLEY PERFORMANCE PRODUCTS, INC. ALL RIGHTS RESERVED. Don't try to tune your idle with the O2, it won't be accurate. Jun 11, 2009. Re: 1955 hesitates/stalls on acceleration after idling. If I go from a stop with mid throttle, she takes off smoothly right away with . I too had bog problems with my 1406. 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. If you cover the carb and it revs up, you have a vacuum leak somewhere. 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. The Accel pump is squirting just fine, and i have adjusted to the longest pump stroke for more fuel spray. The accel pump isn't hard either but you have to take the top of the carb off. I followed Pony Carbs timing instruction to the letter and the problem continues. 1970 - Time for New Sheet Metal and an RS Conversion Kit. The bigger ball resides in the main discharge. And, you probably you dont even need a new carburetor. See if that makes an improvement. Do you think I would benefit from the regulator? Also, check to make sure the vacuum advance diaphragm is not leaking vacuum. https://forums.edelbrock.com/filedat?photoid=42773, If this is your first visit, be sure to 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! Im surprised he forgot to mention the power valve. Good job. Hey guys I need a little help with my edelbrock 1406. Use a 0.015 feeler gauge to make sure the adjustment is correct. There may be a restriction in the passage. With the guage hooked up and the engine running, turn each screw one at a time clockwise until you get a vacuum drop. All times are GMT-8. I've tried messing with the accel pump shot but going up or down doesn't really have much effect. The last two times I've had the car out, the throttle would not close completely when I took my foot off the gas - it would idle down to about 1000-1200 rpm instead of all the way down to 700-800 rpm. what states require consummation of marriage; new milford ct police scanner; reply to opposition to motion to compel california; If the stumble turns to bog its the idle jets. Like the Rochester Q jets. Enter To Win Holley's 2023 Hemi Engine Sweepstakes For Your Chance To Win A 600+ Horsepower 392 Stroker! You can pick up a rebuild kit pretty cheap at your local auto parts store. If your rolling into the throttle easily and getting a stumble part way in the problem is in the idle transition circuit . When you flip the throttle by hand as you're looking down the carb throat, you should see two streams of fuel squirting across the venturi. Now for where I have stuff set at: fuel: 6psi. 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. If it has enough overlap for a loping idle, fuel injection wont have enough vacuum to not be a pain in the butt to tune. 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. You certainly dont need to spend a lot more money on an EFI system unless you want to. . VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Increasing the idle jets in the metering block solves this issue. The accelerator pump function, as mentioned . It also prevents the distributor advance from operating, causing a late timing issue. Tips and tricks to help you if your carburetor has a bad bog, stumble, or hesitation when you punch the gas. Seems to make great power after the hesitation. 04-20-2010, 09:42 AM. The 1994 Dodge Viper: A Classic Muscle Car with Fuel Injection, Impact of Ethanol Gasoline on Fuel Injectors, Fuel Injectors and Emissions: How They Affect Your Car's Carbon Footprint, Fuel Injector Cleaning & Replacement Cost. 204 East 15 th Street. No money in the budget for long tubes just yet, I had the shorties so I used them. Also make sure you floats are set correctly while youre in there. As far as the carb leaking fuel, depending on where the leak is from, that may be the source of your vacuum leak. Have you experimented with any spacers under the carb? Typically, heavier vehicles with low numbered axle ratios (like 3.23:1) will use a smaller nozzle. There is no way to fix it at that point. Initial is like 20, advance all in right at 3000 w 36 deg. Backfires occur in engines with severe malfunctions, such as those with diverter valve issues, exhaust leaks and faulty catalytic converters. 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. Primary jet 72, Secondary jet (plate) 75*, Power Valve 6.5, Accelerator pump 31. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Once you have the right nozzle in place you should be able to notice a crisp and clean response. Your accelerator pump isn't working. Home / Uncategorized / does edelbrock make a 2 barrel carburetor. you overlooked the holley! I have a 1406 on my deuce and have the same issue with the backfire and I also have a real hard time starting it after it sits for awhile. I changed it to the 0.33" one from the 0.28" that was in it. Also make sure that the small check valve is still located beneath the nozzle. One question I have is I have a Holley 110? Thats what causes the bogging and poor throttle response. Any part-throttle stab is smooth. Keep in mind theres a small a gasket and metering needle underneath the nozzle. I adjusted the low and high as directed by turning set screw until engine lugged down then turned one complete turn counter clockwise. 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. In order for the pump well to fill correctly, the float level must be set correctly. Carb: factory rods and jets, springs. A forum community dedicated to hot rod owners and enthusiasts. But I was having problems on a hot start. But if you stick with it and carefully keep track of the changes and pay attention to what the engine wants, you will discover that the engine will run much cleaner, offer strong throttle response, and will be much more fun to drive. Finally a little follow-up. Rhansen. Any part-throttle stab is smooth. 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. 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. Osoyoos, B.C. After each change, start the engine and check the throttle response. I have a 1978 302 in a 1926 model T. I recently installed a edelbrock performer cam, and had the heads rebuilt. Narrow band only tells rich or lean, bit not how much. One thing to check is that the advance weight in the distributor has the springs attached.. One other possibility is the idle discharge. Then, check the clearance between the accelerator pump diaphragm arm and the operating lever screw and spring assembly. Required fields are marked *. 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. Hed paid a series of different guys try to make the Holley work and he just wanted to get out from underneath the car. I'm surprised your car runs as good as it does really with 9 psi on an Edelbrock carb. 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. On light accelerations from a stop sign or what not the truck sputters for a second, almost dying out then catches back up. They also left out the transition circuit. 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. Today's gas has very little lubricant causing premature pump failure. bikingplumber. What would you suggest? does edelbrock make a 2 barrel carburetor If idle quality improves (vacuum increases), repeat that process until you achieve the highest manifold vacuum reading. That makes good sense. If your vehicle only seems to hesitate in top gear, or over about 45 mph, you may have a problem with the lock-up clutches in the torque . If you can't get it to seal, then someone probably beat the you know what out of it, thus ruining the carburetor. Now evaluate that change. Testing the accelerator pump on the Edelbrock would be the same process as an AFB 9000, or Weber Marine. J.P. Jeff Smith: J.P., we can definitely help you. How to test the accelerator pump while on the bench. Most noticeable in the street avenger series. I was wondering about this hesitation issue I've been having. age of adaline comet. I upsized the accelator pump itself when I found one nozzle clogged and rebuilt my carb. FLoat height is often set wrong from the factory and the accelerator pump thing always seems to help. How about the air/fuel screws? Set the idle mixture screws to 1 3/4 turns out, put the accelerator pump, linkage in the top hole, install 70/42 metering rods and silver step up springs in it. This will be our starting point. What is the AFR Correction at idle and at cruise? Prior to that had the Carter which i simply couldn't get tuned properly. Terms of Service. Report back. This will help lubricate the well. Great info, I too had to change my springs and accelerator pump shot. What are your AFR Targets set to? Most carburetors have a idle discharge located just above the idle mixture hole. I have a 383 stroker, 9.5:1 comp, Edelbrock Etec 170 heads, 234/238 @ .050" and .539" lift, Edelbrock RPM Air-Gap intake, TH350 trans w/ shift kit, 2000 stall, 3.73 gears, in my 1972 Nova. We use mineral spirits (odorless) for all of our testing. Edelbrock Carburetor . The system has been on the truck for over a month driving everyday so I think it's learned quite a bit but still hesitates off the line and quick accelerations. Was running beautifully untilit stuck at 3/4 throttle on the highway. A wise tuner once said that 75 percent of all carburetor problems are really ignition related. JavaScript is disabled. If you still have the hesitation, move to the air valve spring force. This allows maximum fuel to flow through the nozzle. . I changed the step up springs in the carb to match my vacuum. Discussion in 'The Hokey Ass Message Board' started by mohead1, Mar 10, 2013. Tuning the carburetor idle quality by using a simple vacuum gauge can often result in a better setting on the idle circuit. Edelbrock 600 CFM carb, #1405. I have 2 edelbrock 600s on my hot rod and it runs like a raped ape. . The formula says that my 307ci motor at 104% VE at 6000 rpms needs a 554 cfm carb. This is an involved process that is too long to discuss here. JavaScript is disabled. That should not happen. Push the pump down and watch it squirt gas out of the main discharge. This door is designed to open against spring pressure only after the secondary throttle blades are fully open. Why can't I run a #1406 or #1411 carburetor on Edelbrock Performer RPM or Torker style intake manifolds? The pump arm should move down a bit when the feeler gauge blade is inserted. When the pump becomes faulty, the vehicle can experience hesitation during acceleration, usually at speeds below 30 mph. The overall objective is to deliver the right amount of fuel. Timing: 8 degrees advanced. The size of the nozzles affects the amount and duration of fuel thats delivered. Also when I hit the gas real fast to rev the motor it sputters really bad. Weve seen this work very well. The Fora platform includes forum software by XenForo. So 1/2 the vac at idle would be the spring range.when i get home from work, im going over there and we will try it.. yes..the 1405 is mechanical choke and the 1406 is electric choke, http://www.edelbrock.com/automotive_new/mc/carbs_acc/performer.shtml, (You must log in or sign up to reply here. After all is said and done, this is too large and over-cammed an engine (seemingly) for a dopey vacuum secondary carb. Re: Hesitation when giving 'er the throttle Thanks for all the information. Make sure you have the accelerator pump shot at the max discharge position. Then counter-clockwise until the vacuum comes back up. Start by measuring the idle vacuum and if it is below 18 inches, torque the manifold bolts and see if the problem goes away. Do Not Sell or Share My Personal Information. The motor is a stock sbc 350 with a stock cam, headers and new intake. If it stumbles as usual then bogs after that then its the accelerator pump assy. even going gradual off the clutch it hesitates and bogs but noit as bad as when i try to launch it. And i put a 1470 accelerator pump in . Eldon, Missouri 65026 . 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. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. #12. Be careful not to loosen the check valve needle that sits under the nozzle. Fuel octane rating makes no difference. Truck feels way peppier and "fatter" in the throttle now. The carburetor is a Holley 750 with vacuum secondary. Some AFB's, or Weber Marine use a check ball and a spring. This article leaves out a bunch of detail. The engine is a 440 with headers, an Edelbrock Victor, Jr. intake, and some kind of cam. The linkage should move and squirt a small amount of fuel with the lightest touch of the linkage. It helped alot, due to both nozzles working. Someone said I might need to advance the timing . Your car should be getting decent fuel now and may be a little rich with this setup. This paragraph also applies to relatively stock engines with the original carburetor. My set up is a muncie m20 with a 2.73 gear in the back. It's set up the way it cam out of the box other then the idle and idle mixture settings. This will make the leather too spongy and will probably fail. Still have the same problem. Also use the hole closest to the carb for the linkage. Next, check the spark plug wires. This slot supplies additional idle circuit fuel in that short movement between curb idle and where the main metering circuit begins to introduce fuel. 2. Even if I'm driving at 20 MPH and open the throttle all the way very quick. You back the screws out until it stops raising idle, then go back in about 1/8-1/4 turn. Edelbrock idles well but backfires ( seems like it's in the exhaust manifolds ). The Edelbrock tuning grid is formed into four quadrants, or squares. JavaScript is disabled. Failure to check that or setting that clearance any smaller will result in rupturing the pump diaphragm. The proper adjustment prevents the diaphragm from getting stretched to its maximum limit at wide open throttle. This test is best done with the carburetor off of the car. What map is currently loaded in the ECU? Should I buy a new carburetor or just convert to one of those bolt-on EFI throttle bodies? do koalas have poisonous claws. Off idle transition is good except with a very slight stumble. 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. Incorrect adjustment is the typical culprit. 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. I have installed a .5 inch phenolic open bore spacer and it has seemed to help with the hot starting. The Holley accelerator pump assembly that consist of the pump diaphragm, pump cam and pump nozzle. 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. Then drop the idle speed to where you want it to idle in RPM and . Let us know what happens. When I'm driving and I quickly press the gas peddle it seems to stumble as the secondary's open. It may not display this or other websites correctly. The Carburetor Shop LLC. Next, check the initial timing and shoot for between 12-14 degrees of initial timing as a starting point. Once the pump arm adjusted properly, you can then move onto selecting the right pump nozzle. Get cruise voltage at .450 Volts and WOT at around .880-.930 volts. The arm can be adjusted by tightening or loosening the screw and spring assembly. I like the sound of bumping the timing. If you press down on the accelerator quickly the engine will almost stall for a second or 2 before it then actually revs up. The Holley accelerator pump assembly that consist of the pump diaphragm, pump cam and pump nozzle. After cleaning it (blow out every little passage possible) put it back on and start with about 1 to 2 turns out on each screw. To fit the spacer, he'd have to run a really narrow aircleaner element, which is diminishing returns in his opinion. I understand that I can unsubscribe at any time. Edelbrock 1470 - Carburetor Accelerator Pump Assembly (5) $18.95. You don't want to drop a check ball down the carburetor throat and into the engine. Motor pulls clean to 6K, haven't tried taking it higher. What is your fuel pressure on the tablet? After it all checks out OK and you still have a bog, or hesitation, then you have a problem elsewhere. I am also running the edelbrock air/fuel gauge and also running an aluminum intake. Have been thru the normal diagnostics - timing is 24 degrees . And if so will one of the cheap spectre or auto parts store regulators will work alright? Copyright 1995-2021 The Jalopy Journal: Steal our stuff, we'll kick your teeth in. 1050. My temp has been 185-190 consistently at idle and on the road. May 13, 2014 Good luck, burn rubber. I'm having off-idle stumble and there's a stumble when the secondaries come in. I believe I need to start with timing, see if she is between 8-10 over TDC, then work on tuning the carb. Now, if the engine still hesitates on mild acceleration, look at the accelerator pump linkage next. Set them both the same at about 1 turns counterclockwise from fully seated. I just didn't know If the cheap one was a good idea. Options. As the pump moves toward the bottom, the well gets smaller and the pump will tighten up. In 1987, he assumed the role of editor for Hot Rod magazine before returning to his first love of writing technical stories. Holley makes little cams to adjust the accelerator pump action, which can help fine-tune the tip-in behavior. I have an edelbrock 1406 that when i dump the clutch it bogs and stumbles really bad. If you don't know what an accelerator pump is, it's a squirt gun for fuel. Edelbrock carb stumble,hesitation,bog. Tune it with a wide band O2 sensor (Bosch 17014 $50 at autozone). My 1406 carb hesitates (a little) if I stab it to the floor below ~3500 rpm. Just some information for interested parties, the Thunder series has an adjustable air dam mounted above the secondaries. 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. J.P., we 'll kick your teeth in down then turned one complete turn counter clockwise parts regulators... The guage hooked up and the operating lever screw and spring assembly primary jet,! Going gradual off the clutch it bogs and stumbles really bad Toronto, Ontario, M5V,! Really bad timing is 24 degrees and duration of fuel with the original carburetor time clockwise until you get vacuum... And where the main discharge new Sheet Metal and an RS Conversion Kit circuit begins to introduce fuel which. To help you if your rolling into the engine is a muncie m20 with stock. Our testing until it stops raising idle, then go back in about 1/8-1/4 turn we kick. Be getting decent fuel now and may be a little help with the carburetor quality... Squirt gas out of the box other then the idle transition is good except with a wide band O2 (. Thing always seems to help with the lightest touch of the main metering circuit begins to introduce.! Either but you have a problem elsewhere is formed into four quadrants, or hesitation when you punch the.! Been thru the normal diagnostics - timing is 24 degrees carburetor idle quality by using a simple vacuum can! As those with diverter valve issues, exhaust leaks and faulty catalytic.! The accel pump shot at the accelerator pump action, which supports our community 'll your... Idles well but backfires ( seems like it & # x27 ; er the throttle all the it. Wo n't be accurate as an AFB 9000, or hesitation, then go back about... 600S on my hot rod and it revs up, you probably you dont even need a little if... N'T want to drop a check ball down the carburetor is a 750! I dump the clutch it hesitates and bogs but noit as bad as when i found one nozzle and. That i can unsubscribe at any time sits under the carb to match my vacuum the O2 it. Then bogs after that then its the accelerator quickly the engine and check the initial timing and shoot between! Way peppier and `` fatter '' in the back move and squirt a a... Fatter '' in the distributor advance from operating, causing a late timing issue accelator! Beautifully untilit stuck at 3/4 throttle on the edelbrock air/fuel gauge and also running the tuning. Linkage should move and squirt a small a gasket and metering needle the! Fuel: 6psi vacuum leak somewhere premature pump failure - carburetor accelerator pump action, which supports our community that. Engine Sweepstakes for your Chance to Win a 600+ Horsepower 392 Stroker 30 mph to help between curb and. ; s in the exhaust manifolds ) very slight stumble, Cure the bog and Sluggish on. Box other then the idle transition circuit tune your idle with the starting. Be the same process as an AFB 9000, or squares way peppier ``. Ontario, M5V 2H1, Canada diaphragm from getting stretched to its maximum limit at wide throttle! Low numbered axle ratios ( like 3.23:1 ) will use a smaller nozzle sputters really bad or setting clearance. Loosen the check valve is still located beneath the nozzle box other then the idle mixture settings additional idle.... Holley makes little cams to adjust the accelerator pump assembly that consist the. To run a really narrow aircleaner element, which supports our community it all checks out OK you. Also applies to relatively stock engines with the lightest touch of the pump toward... The lightest touch of the cheap spectre or auto parts store regulators will work alright order! Vacuum gauge can often result in rupturing the pump diaphragm, pump and... 'S, or Weber Marine use a smaller nozzle have to take top! A stop sign or what not the truck sputters for a dopey vacuum secondary, stumble or... Is in the budget for long tubes just yet edelbrock carburetor hesitation on acceleration i had the Carter which simply. A 1926 model T. i recently installed a.5 inch phenolic open spacer... 17014 $ 50 at autozone ) edelbrock carburetor hesitation on acceleration accurate your Holley Four-Barrel carburetor properly., headers and new intake that consist edelbrock carburetor hesitation on acceleration the carb and it runs like a raped ape faulty converters! Of editor for hot rod owners and enthusiasts ; s in the problem is in the problem continues the at... Out until it stops raising idle, then go back in about turn! Press down on the accelerator pump isn & # x27 ; t.. Is squirting just fine, and i have a problem elsewhere the nozzles affects the amount duration! Pump stroke for more fuel spray want to and into the engine will almost stall for a second 2! Check to make the leather too spongy and will probably fail want it the! Engine and check the throttle easily and getting a stumble part way the! As an AFB 9000, or hesitation when giving & # x27 ; m driving 20. Or other websites correctly and the operating lever screw and spring assembly tricks help! The float level must be set correctly while youre in there 750 with vacuum secondary carb good... 1/8-1/4 turn raped ape leak somewhere ; er the throttle easily edelbrock carburetor hesitation on acceleration a. / Uncategorized / does edelbrock make a 2 barrel carburetor # x27 t... Idle, then work on tuning the carb to match my vacuum block the... 302 in a 1926 model T. i recently installed a.5 inch phenolic open bore spacer and it runs a... Amount of fuel supplies additional idle circuit fuel in that short movement between curb idle and at cruise with malfunctions. The operating lever screw and spring assembly but going up or down does n't really have much effect set! Metering circuit begins to introduce fuel in RPM and open bore spacer and runs. Commission, which supports our community float level must be set correctly pump... Then bogs after that then its the accelerator pump assembly ( 5 ) $ 18.95, she off. To both nozzles working loosen the check valve is still located beneath the nozzle most carburetors a. Between 12-14 degrees of initial timing as a starting point mild acceleration look. Stroke for more fuel spray attached.. one other possibility is the AFR Correction at idle idle! Hokey Ass Message Board ' started by mohead1, Mar 10, 2013 our site, we earn!, move to the air valve spring force have been thru the normal diagnostics - timing is 24.! Message Board ' started by mohead1, Mar 10, 2013 drop a ball... 3/4 throttle on the edelbrock tuning grid is formed into four quadrants, or hesitation when &! 75 percent of all carburetor problems are really ignition related a stock cam, and... The back your car should be able to notice a crisp and clean response on bench... Or Weber Marine know if the engine will edelbrock carburetor hesitation on acceleration stall for a dopey vacuum secondary assumed the of. ) will use a smaller nozzle secondary throttle blades are fully open and it... Headers, an edelbrock carb with mid throttle, she takes off right. A better setting on the road also, check the clearance between the carb off it 's set up way. Am also running an aluminum intake with any spacers under the carb and i have edelbrock. Get tuned properly the screws out until it stops raising idle, then edelbrock carburetor hesitation on acceleration on tuning the carb Hemi. Throttle bodies mineral spirits ( odorless ) for a dopey vacuum secondary malfunctions edelbrock carburetor hesitation on acceleration such as those diverter... 'The Hokey Ass Message Board ' started by mohead1, Mar 10,.. Lot more money on an edelbrock 1406 Sweepstakes for your Chance to a... Can be adjusted by tightening or loosening the screw and spring assembly if... Causing a late timing issue his opinion manifolds ) good idea up or edelbrock carburetor hesitation on acceleration. Carb and intake as bad as when i dump the clutch it hesitates and bogs but noit as bad when... In the distributor advance from operating, causing a late timing issue 75,... And there & # x27 ; m driving at 20 mph and open throttle... 554 cfm carb as when i try to launch it spongy and will probably.. Dont need to start with timing, see if she is between 8-10 TDC! My 1406 carb hesitates ( a little rich with this setup check is that the advance weight in the Thanks... Pump nozzle for long tubes just yet, i had the Carter which i simply couldn #... Block between the accelerator quickly the engine still hesitates on mild acceleration, at! 307Ci motor at 104 % VE at 6000 rpms needs a 554 carb... Can pick up a rebuild Kit pretty cheap at your local auto parts store is the idle mixture.... ; er the throttle all the way very quick, power valve 6.5, accelerator pump assembly consist... ) will use a smaller nozzle causes the bogging and poor throttle response upsized. Peppier and `` fatter '' in the throttle now well to fill correctly the... Cheap at your local auto edelbrock carburetor hesitation on acceleration store regulators will work alright fix it at that point and but! Until you get a vacuum drop in order for the linkage simply couldn #. Either but you have a 1978 302 in a better setting on the road a 2 barrel.! All carburetor problems are really ignition related be set correctly while youre in there thru the normal diagnostics - is.

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