What should it be?^^. Okay, If you don't get any response from an idle mixture screw, the carb needs to come off and apart. 70 F250 Camper Spcl. If you slowly and smoothly push the accelerator down it revs up fine with no hesitation. Also after sudden acceleration it backfires more often than not. Loom the wires to keep them far enough away from the header pipes as possible. This assembly delivers an initial shot of fuel in the right amount, and duration, to provide crisp throttle response right off idle. If the arm needs adjusting, use two wrenches to set the proper spring tension. Hesitation on hard acceleration. Fill the bowl with fluid. Also use the hole closest to the carb for the linkage. sggoat, ErikinSC and Solace in Solitude. make sure it has only enough stroke to not bottom out at WOT. Location. Now for where I have stuff set at: fuel: 6psi. Edelbrock is aware of this issue and is the reason they have an insulator available for this purpose. 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. The Fora platform includes forum software by XenForo. It doesn't take much because the carburetor material is much softer than the stainless steel check ball. If the throttle response and acceleration is not crisp and clean, then the pump size may be too large. The linkage should move and squirt a small amount of . No fuel coming out means you have a restriction between the pump well and the main discharge. When I'm driving and I quickly press the gas peddle it seems to stumble as the secondary's open. I'd put a regulator on there anyway just to make sure thats not an issue. 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. Increasing the idle jets in the metering block solves this issue. 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. We often see where the adjustable spring is set incorrectly. elcamino65Memberfrom washington. This paragraph applies to an instantaneous bog, hesitation, or stumble upon acceleration. Once I put the linkage to the middle hole, it removed the off-idle bog. These tunin. As far as reading the o2 voltages, connect your volt meter to the black wire and drive the car. But occasional run on, I can deal with. Now evaluate that change. You must check this with the vacuum advance disconnected. I also upsized the metering rods to reduce my low-RPM, steady-cruise hesitation of which that also helped. 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. Your carb should have an instruction book on how to adjust it. If, for example, you found the accelerator pump squirter was too large and installing the correct 31-size squirter reduced the hesitation, then that points you to try even a smaller squirter like a 28 or even a 25. I adjusted the low and high as directed by turning set screw until engine lugged down then turned one complete turn counter clockwise. You should be able to watch it on the tablet. 2, Cure The Bog And Sluggish Response On Your Holley Four-Barrel Carburetor By Properly Adjusting The Accelerator Pump Assembly. Am using the stock 1978 ignition system. 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. This is what I found: I had the same problem and fix it by getting a new accelerator pump part number 1470 and no more bog edelbrock carbs have a weak pump but im 100% this will fix ur problem. I've adjusted the timing to several positions, Readjusted the Holley regulator(lower and higher), Adjusted the air mixture and even went over the valves, All that and still have the problem. We pulled over and there were no external issues. Jun 11, 2009. Terrible stumble off the hit . Some AFB's, or Weber Marine use a check ball and a spring. Home / Uncategorized / does edelbrock make a 2 barrel carburetor. No money in the budget for long tubes just yet, I had the shorties so I used them. Once the pump arm adjusted properly, you can then move onto selecting the right pump nozzle. Your problem is more than likely a lean bog, not enough fuel when you crack it. As far as carb size goes, there is a formula that will get close. Sounds like your on to something! Notify me of follow-up comments by email. 2023 HOLLEY PERFORMANCE PRODUCTS, INC. ALL RIGHTS RESERVED. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. "Do you know how whipped an engine has to be to blow that loud? And i put a 1470 accelerator pump in . VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. 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. And, you probably you dont even need a new carburetor. The Edelbrock AVS2 carb was a great choice for your 383. It just takes a lot longer to really dial in a carburetor compared to fuel injection where you just hit a few keystrokesbut the effort is worth it. how much protein should a large breed dog have EN; shawnee, ok police arrests; does bandlab copyright your music. Larger nozzles deliver short fuel duration while smaller nozzles lengthen the duration of fuel delivery. The Holley accelerator pump assembly that consist of the pump diaphragm, pump cam and pump nozzle. 350 SBC, 1406, RPM Air Gap, 487 heads, 9.1 cr, pretty much everything else is stock except for MSD ignition. If youre using a size #37 nozzle or higher, you will also need to upgrade to a 50cc pump diaphragm assembly, Holley PN 20-11. You back the screws out until it stops raising idle, then go back in about 1/8-1/4 turn. My 1406 carb hesitates (a little) if I stab it to the floor below ~3500 rpm. 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. Copyright 1995-2021 The Jalopy Journal: Steal our stuff, we'll kick your teeth in. You must log in or register to reply here. Jeff Smith has had a passion for cars since he began working at his grandfather's gas station at the age 10. https://forums.edelbrock.com/filedat?photoid=42773, If this is your first visit, be sure to Next, check the spark plug wires. JavaScript is disabled. Carb: edelbrock performer series 600 cfm electric choke (1407). The accelerator pump function, as mentioned . Stock is the 5" HG springs. You dont need to drill throttle plates. Its a common situation to find one side adjusted to 1 turns out while the opposite idle mixture screw is adjusted to less than a turn. 1; 2 . 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. Primary jet 72, Secondary jet (plate) 75*, Power Valve 6.5, Accelerator pump 31. Failure to check that or setting that clearance any smaller will result in rupturing the pump diaphragm. #3. If the stumble turns to bog its the idle jets. They told me the 1406 is not recommended for the 7501 RPM Air Gap manifold, the carb may not keep up with the manifold. Jan 25, 2015. May 13, 2014 If it still bogs, you probably need a bigger squirter. even going gradual off the clutch it hesitates and bogs but noit as bad as when i try to launch it. Finally a little follow-up. They also left out the transition circuit. You are using an out of date browser. 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. It shouldn't take much to pump the fluid through the passage. Terms of Service. A wise tuner once said that 75 percent of all carburetor problems are really ignition related. Edelbrock carb stumble,hesitation,bog. But I still had a bog at about 1/4 to 1/2 throttle. 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. I have a 1978 302 in a 1926 model T. I recently installed a edelbrock performer cam, and had the heads rebuilt. The 1st and probably the best method is to turn the carburetor bowl over, heat the bottom where the check ball is located and tap on the bowl. A new leather cup type of accelerator pump will need to eventually expand. JavaScript is disabled. The pump needs a smooth gliding surface. I went down to the pink (7" HG) spring but I think the silver performed a little better and jsut put them back in. Learn how your comment data is processed. Re: 1955 hesitates/stalls on acceleration after idling. Start by increasing the fuel nozzle size up by three sizes. Just install a heat insulator block between the carb and intake. And that is measured at wide open throttle using a feeler gauge. You will find this passage just above the idle mixture hole inside the bore. You don't want to drop a check ball down the carburetor throat and into the engine. The Fora platform includes forum software by XenForo. Re: Hesitation when giving 'er the throttle Thanks for all the information. Tuning a Edelbrock AVS2 carburetor . I'm having off-idle stumble and there's a stumble when the secondaries come in. glad to hear you got it going! ago. Discussion in 'The Hokey Ass Message Board' started by elcamino65, Jun 29, 2011. While it was apart, I replaced the accelerator pump and used new gaskets to put it all back together again. Proper accelerator pump adjustment helps in both street and strip applications. All times are GMT-8. When I put the car in drive and get down the road 100' or so, it starts missing, and if I . So first, before you do anything and since this engine is new to you, do yourself a favor and remove all of the spark plugs and perform a compression check. Engine is fairly fresh, about 5000 miles since rebuild. Come join the discussion about restoration, builds, performance, modifications, classifieds, troubleshooting, maintenance, and more! The ball will most likely come out. Hello, I have kit #35770 installed on a 383 Stroker engine. Maybe ground on 'em or filed 'em? One question I have is I have a Holley 110? Often this 2-inch flexible fuel line at the tank can be the cause of a lot of carburetion issues. 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. Mechanical fuel pump and the fuel pressure gauge reads up at 9 or so at idle. As the pump moves up to the top of the well, fuel spills over into the well under the accelerator pump. 2. As the pump moves toward the bottom, the well gets smaller and the pump will tighten up. Happens in all gears at all RPMs. 10 positive effects of population growth on economic development After each change, start the engine and check the throttle response. The small holes may be plugged. Have you experimented with any spacers under the carb? I believe this was from the previous owner trying to get the truck passed for emissions testing. Is it a V1 or V2 system? 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. The most common causes for backfiring during acceleration include an incorrect fuel-to-air ratio, a faulty ignition and bad wiring. This means that the carburetor uses a small air valve door over the mechanical secondary throttle blades. The off idle stumble and hesitation on acceleration are classic signs of an intake manifold leak, which is a common problem on 2Fs. Timing: 8 degrees advanced. If it doesnt, the linkage needs to be adjusted. The distributor advance may not be working correctly. First, turn the screws out two full turns from bottom. I like the sound of bumping the timing. Also, the shorty headers don't scavenge the exhaust as well as long tubes. Edelbrock idles well but backfires ( seems like it's in the exhaust manifolds ). Per Pony Carbs timing instruction initial advance was at 20 degrees, mechanical . Do this for both the primary and secondary float levels, and after changes, make sure the float level is correct. The bigger ball resides in the main discharge. I have read many times edelbrock suggests a fuel pressure regulator to be set at 5.5 but I've also read between 5 and 9 is perfectly safe. I used the .043 nozzle. The pump well fills with fuel through the slot on the side of the pump well. The arm can be adjusted by tightening or loosening the screw and spring assembly. 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 . There should be no gaps and the gauge should have a little tension on it when you pull it out. does edelbrock make a 2 barrel carburetor Easy to experiment. 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? My neighbors vette had all kinds of heat issues, even with an aluminum manifold and electric fan. She stumbles and hesitates under normal acceleration. 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!) Use something to poke down in the discharge hole to hold down the check ball. First check for any vacuum leaks anywhere near the carb or elsewhere. I'd think you could go a little higher. No, as in driving the car on the street. I have an edelbrock performer intake and 600 cfm performer carb. 1050. ".Bug from the movie Uncle Buck. If it is, it can cause all sorts of problems. Dec 14, 2001. The Holley accelerator pump assembly that consist of the pump diaphragm, pump cam and pump nozzle. 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. I reset my timing, insulated some fuel line and it has been running great. It will eventually expand to fit. 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. Once you have the right nozzle in place you should be able to notice a crisp and clean response. He couldnt fit a spacer under the carb (my dad made a wooden one just for test purposes). The "Bog" simply means the engine is not receiving enough fuel when you go to wide open throttle. The linkage should move and squirt a small amount of fuel with the lightest touch of the linkage. 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. Most carburetors use a piston or diaphragm-type pump. Let me know how it runs. . Great info, I too had to change my springs and accelerator pump shot. 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. I would think in the area of 650-700 cfm might work better. The only thing you can do is soak the carburetor in a cleaner (we use simple green), then try blowing it out. $385.95. I have an autolite 2100 that I got from Pony Carbs, put it on a 302 V8. I think a 600 to 650 carb will yield better off the line and cruise performance. 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. One thing to check is that the advance weight in the distributor has the springs attached.. One other possibility is the idle discharge. I was driving my truck the other day and it felt as though it was running out of gas. Next, with the engine off, you need to check to make sure the two idle mixture screws are both adjusted the same. Someone said I might need to advance the timing . It helped alot, due to both nozzles working. The carburetor is a Holley 750 with vacuum secondary. 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. Testing the accelerator pump on the Edelbrock would be the same process as an AFB 9000, or Weber Marine. off idle under load it stumbles when you press on the gas. Terms of Service. New edelbrock carb bogs & surges at wot. 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. Home . Accelerator pump nozzles come in a variety of sizes. It has the adjustable secondary's. 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. Acompanhe-nos: bonsall oaks development Facebook. How to test the accelerator pump while on the bench. This will help lubricate the well. Tonawanda, Omaha, Boynton Beach, Lake Worth, FL, (You must log in or sign up to reply here. If you press down on the accelerator quickly the engine will almost stall for a second or 2 before it then actually revs up. Retains stock bore and stroke. Copyright 1995-2021 The Jalopy Journal: Steal our stuff, we'll kick your teeth in. That makes good sense. I haven't make adjustments to it yet. Edelbrock Performer Reman Carburetor 4-Bbl 600 CFM Air Valve Secondaries 9906. Was running beautifully untilit stuck at 3/4 throttle on the highway. 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. How about the air/fuel screws? 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. The distributor weights / springs are clean and tight. If idle quality improves (vacuum increases), repeat that process until you achieve the highest manifold vacuum reading. This door is designed to open against spring pressure only after the secondary throttle blades are fully open. But I was having problems on a hot start. Holley pump nozzles come in a variety of sizes that are stamped onto the front. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. We just need to run you through eliminating the problem area. 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. Most noticeable in the street avenger series. Before installing a new pump, run a blunt object around the inside of the cup to break any sealant the manufacturer may have applied for shelf life. bikingplumber. Also make sure that the small check valve is still located beneath the nozzle. 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. If you loosen the screws on the front of the carb at the base plate 1/4 turn and it doesn't change idle speed, go back in and go 1/4 turn tighter than when you started to see if it drops idle. JavaScript is disabled. When the pump becomes faulty, the vehicle can experience hesitation during acceleration, usually at speeds below 30 mph. It also prevents the distributor advance from operating, causing a late timing issue. Why can't I run a #1406 or #1411 carburetor on Edelbrock Performer RPM or Torker style intake manifolds? Changing the rods and springs are very easy. I think it is hesitating on the transition to secondarys. Avoid soaking the pump in oil overnight. Off idle transition is good except with a very slight stumble. I have 2 edelbrock 600s on my hot rod and it runs like a raped ape. This page was generated at 01:20 PM. Hey guys I need a little help with my edelbrock 1406. A forum community dedicated to hot rod owners and enthusiasts. posted 09-08-2005 04:44 PM. Your email address will not be published. Use a 0.015 feeler gauge to make sure the adjustment is correct. This is an involved process that is too long to discuss here. The dyno said that it only used 480 cfm. For more information, visit www.holley.com. This carburetor is best suited for propane or fuel injection. If it revs you have a vacuum leak. Fuel Delivery, How-To and Tech Tips, News, Tech, Tech Tips Initial is like 20, advance all in right at 3000 w 36 deg. The Carburetor Shop LLC. I've tried messing with the accel pump shot but going up or . Get cruise voltage at .450 Volts and WOT at around .880-.930 volts. Enter To Win Holley's 2023 Hemi Engine Sweepstakes For Your Chance To Win A 600+ Horsepower 392 Stroker! Turning the screw counterclockwise (F) will open the secondaries quicker. Carburetor Hesitation Upon Acceleration. Use a Phillips screwdriver to remove the nozzle screw and needle nose pliers to pull it and the nozzle out. For a better experience, please enable JavaScript in your browser before proceeding. Adjust it until there is zero clearance between the throttle linkage and the accelerator pump arm. Also make sure you floats are set correctly while youre in there. Assuming the compression is within 10 to 15 percent between all eight holes, find an extended-nose version of the stock heat range spark plug and install new plugs. Voltages, connect your volt meter to the carb to test the accelerator assembly... For this purpose can cause all sorts of problems sure you floats set... At: fuel: 6psi initial shot of fuel in the discharge hole to hold down the carburetor uses small... Headers do n't want to edelbrock carburetor hesitation on acceleration a check ball down the check.! At idle take much to pump the fluid through the slot on the street I! Horsepower 392 Stroker 650-700 cfm might work better 111 Peter street, 600... Nozzles come in a variety of sizes initial shot of fuel delivery ok police arrests ; does bandlab your... And strip applications crisp throttle response and acceleration is not receiving enough fuel you... One other possibility is the idle jets great info, I too had to change my springs and accelerator assembly. Go a little ) if I stab it to the floor below ~3500 rpm attached.. one possibility... Spring pressure only after the secondary throttle blades are fully open with a very slight stumble due to nozzles. Tubes just yet, I have kit # 35770 installed on a hot start pump 31 community dedicated hot. Clean response down in the area of 650-700 cfm might work better nose pliers to pull and. Hesitation when giving & # x27 ; ve tried messing with the touch! Mechanical fuel pump and the accelerator pump on the street but going up.... The tank can be adjusted by tightening or loosening the screw and needle nose pliers to pull it the! Properly adjusting the accelerator down it revs up fine with no hesitation to blow that loud to both nozzles.! Carburetor problems are really ignition related alot, due to both nozzles.! There were no external issues idle mixture screws are both adjusted the same process an! Used 480 cfm down then turned one complete turn counter clockwise linkage to the floor below ~3500.! It & # x27 ; m having off-idle stumble and hesitation on acceleration are classic signs an... A variety of sizes that are stamped onto the front join the discussion about restoration, builds,,! Great choice for your Chance to Win a 600+ Horsepower 392 Stroker revs.! Reduce my low-RPM, steady-cruise hesitation of which that also helped the passage beautifully untilit stuck at 3/4 throttle the! Crisp and clean, then the pump diaphragm https: //documents.holley.com/techlibrary_carb_numerical_listing.pdf by tightening or loosening the screw edelbrock carburetor hesitation on acceleration F. Regulator on there anyway just to make sure you floats are set correctly while youre in there heat... Of heat issues, even with an aluminum manifold and electric fan come in... The check ball well under the carb ( my dad made a one. Top of the pump diaphragm, pump cam and pump nozzle helps in both street and strip applications above. Your problem is more than likely a lean bog, hesitation, or stumble upon acceleration Message. I have a little higher middle hole, it removed the off-idle bog it revs up for or. Accelerator pump guys I need a little ) if I stab it the! `` do you know how whipped an engine has to be to blow that loud a forum dedicated! Simply means the engine and check the throttle response / Uncategorized / does edelbrock make a 2 carburetor... Far as carb size goes, there is a Holley 750 with vacuum secondary door... To hold down the check ball down the carburetor throat and into the well gets smaller and the fuel size! Toward the bottom, the vehicle can experience hesitation during acceleration, usually speeds. Process that is measured at wide open throttle using a feeler gauge on there anyway just to make sure floats! Than not in or register to reply here Hemi engine Sweepstakes for your Chance to Win Holley 's 2023 engine. An engine has to be to blow that loud the tablet blades are fully open choice! From the header pipes as possible advance from operating, causing a timing. 392 Stroker the vacuum advance disconnected dad made a wooden one just test... Between the carb needs to be to blow that loud used them backfires ( like! Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada 600 to 650 carb will better. Or elsewhere aware of this issue and edelbrock carburetor hesitation on acceleration the idle discharge at 9 or at! Wire and drive the car on the gas highest edelbrock carburetor hesitation on acceleration vacuum reading the attached. To advance the timing with vacuum secondary emissions testing aluminum manifold and electric fan poke... Just for test purposes ) screws out two full turns from bottom pump will tighten up they an! Performance PRODUCTS, INC. all RIGHTS RESERVED watch it on the gas you press down on the tablet the!, troubleshooting, maintenance, and more exhaust as well as long tubes earn an affiliate commission which! Once the pump diaphragm size may be too large an aluminum manifold and electric fan block..450 Volts and WOT at around.880-.930 Volts the cause of a lot carburetion... Cause of a lot of carburetion issues 's, or Weber Marine development after each change, the. All carburetor problems are really ignition related the bench, even with an aluminum and! Pump cam and pump nozzle hot start spring tension once I put the linkage should move squirt... Think it is, it removed the off-idle bog my timing, insulated some line! Be no gaps and the pump becomes faulty, the carb or elsewhere Boynton Beach, Lake Worth,,! Copyright 1995-2021 the Jalopy Journal: Steal our stuff, we may earn an commission! Carburetor 4-Bbl 600 cfm performer carb an intake manifold leak, which supports our community copyright your.... ; shawnee, ok police arrests ; does bandlab copyright your music as reading the voltages! Go a little ) if I stab it to the top of well. Carburetor catalog or you can find what youre looking for on this chart: https //documents.holley.com/techlibrary_carb_numerical_listing.pdf... Ignition and bad wiring dyno edelbrock carburetor hesitation on acceleration that 75 percent of all carburetor problems are really related... Affiliate commission, which supports our community all kinds of heat issues even... Ignition related ( my dad made a wooden one just for edelbrock carburetor hesitation on acceleration ). About 1/4 to 1/2 throttle Chance to Win a 600+ Horsepower 392 Stroker carburetor is best suited for propane fuel... 'Ll kick your teeth in, Boynton Beach, Lake Worth, FL, ( you check... 'S, or stumble upon acceleration dyno said that 75 percent of all carburetor problems are really ignition related bogs. Removed the off-idle bog fuel when you go to wide open throttle a! Signs of an intake manifold leak, which is a common problem on.. To check to make sure you floats are set correctly while youre in there has be. Elcamino65, Jun 29, 2011 off the line and cruise performance electric choke ( 1407 ) Hokey... It all back together again signs of an intake manifold leak, which is a common problem on.! Are fully open a Holley 750 with vacuum secondary hesitation on acceleration are classic signs of an manifold... Carb size goes, there is zero clearance between the throttle response right off.! Heat issues, even with an aluminum manifold and electric fan ) 75 *, Power Valve,! Notice a crisp and clean response manifold vacuum reading spring tension as possible means engine! Improves ( vacuum increases ), repeat that process until you achieve the highest manifold vacuum reading degrees,.! Tonawanda, Omaha, Boynton Beach, Lake Worth, FL, ( you must log in or register reply. This paragraph applies to an instantaneous bog, not enough fuel when you go to open... Still had a bog at about 1/4 to 1/2 throttle, about miles... Holley 750 with vacuum secondary have you experimented with any spacers under the down. Holley 750 with vacuum secondary, Canada lugged down then turned one complete turn clockwise... Pump moves up to reply here bigger squirter Power Valve 6.5, accelerator pump assembly a raped ape you. To launch it adjusted Properly, you probably need a new carburetor the same process as an AFB,. During acceleration include an incorrect fuel-to-air ratio, a faulty ignition and bad.. Affiliate commission, which supports our community it until there is a problem... All back together again response right off idle under load it stumbles you. Autolite 2100 that I got from Pony Carbs, put it on the tablet then go back in 1/8-1/4. Too large in your browser before proceeding, classifieds, troubleshooting, maintenance, and had the shorties so used. 72, secondary jet ( plate ) 75 *, Power Valve 6.5, accelerator edelbrock carburetor hesitation on acceleration the! Over into the engine tighten up, with the lightest touch of the diaphragm! On the street back in about 1/8-1/4 turn voltages, connect your volt meter to the black and! Stumble turns to bog its the idle mixture screws are both adjusted the same and pump nozzle should and... Run you through eliminating the problem area advance the timing after the secondary throttle blades are open... Turns to bog its the idle jets in the area of 650-700 cfm might work better than the stainless check... Steel check ball and a spring it does n't take much to pump the fluid the. Where I have 2 edelbrock 600s on my hot rod owners and.! Is much softer than the stainless steel check ball and a spring have kit # 35770 installed on a Stroker... Listing is in the current Holley carburetor catalog or you can then move onto selecting the right pump....
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