The size of the nozzles affects the amount and duration of fuel thats delivered. Come join the discussion about restoration, builds, performance, modifications, classifieds, troubleshooting, maintenance, and more! I have much the same engine configuration in my T-Bucket. I was driving my truck the other day and it felt as though it was running out of gas. 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. You dont want to deliver too much fuel too soon, or to little fuel too late. For rubber cup pumps, apply a dab of lithium grease to the cup. If it doesnt, the linkage needs to be adjusted. Home . This is very important and typically where we see Holley carbs set incorrectly. For a better experience, please enable JavaScript in your browser before proceeding. The Fora platform includes forum software by XenForo. 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? And if so will one of the cheap spectre or auto parts store regulators will work alright? I believe this was from the previous owner trying to get the truck passed for emissions testing. 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? We just need to run you through eliminating the problem area. 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. Keep in mind theres a small a gasket and metering needle underneath the nozzle. The "Bog" simply means the engine is not receiving enough fuel when you go to wide open throttle. I just don't really have any reason to stab it WOT from idle from a dead stop. As it deteriorates and cracks, it will leak. ). Hey guys I need a little help with my edelbrock 1406. Smith began writing for Car Craft magazine in 1979 and became editor in 1984. While there are other issues that may cause similar reactions within the carburetor, often the problem can be traced back to the accelerator pump system. The well is tapered and also the pump cup may not be swelled up yet. I have an autolite 2100 that I got from Pony Carbs, put it on a 302 V8. JavaScript is disabled. Start by checking the adjustment of the accelerator pump diaphragm arm adjustment screw. If idle quality improves (vacuum increases), repeat that process until you achieve the highest manifold vacuum reading. What are your AFR Targets set to? Use something to poke down in the discharge hole to hold down the check ball. 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. At idle she runs smooth, but at cruising RPM (2nd and 3rd even 4th gear) around 2-3000 RPM (not full throttle, just 1/4 to 1/2 throttle) she has hesitation or sputtering! The engine is a 440 with headers, an Edelbrock Victor, Jr. intake, and some kind of cam. Just install a heat insulator block between the carb and intake. With the guage hooked up and the engine running, turn each screw one at a time clockwise until you get a vacuum drop. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Hesitation, backfire and lean conditions can also be the result of an improperly adjusted acceleration pump assembly, and should be checked using these procedures. Seems to make great power after the hesitation. No money in the budget for long tubes just yet, I had the shorties so I used them. Usually a stumble like your describing is a lean stumble . You may have to pump the accelerator pump a couple of times to get it primed. Stock is the 5" HG springs. Edelbrock Performer Reman Carburetor 4-Bbl 600 CFM Air Valve Secondaries 9906. Now evaluate that change. If it has a 28 squirter change it to a 35 from a 750 did that to my 600 and really helped a lot. My 1406 carb hesitates (a little) if I stab it to the floor below ~3500 rpm. If too much of the transition slot is uncovered at idle, this will cause an off-idle stumble or hesitation. This tunnel ram is set up with a pair of 0 . 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. See if that makes an improvement. Let me know how it runs. If they are way off, thats good. Changing the rods and springs are very easy. Job one with any Edlebrock carb in the experience of many board members here is to move the accelerator pump linkage to the hole closest to the fulcrum (maximum pump shot) and to check the float height per Edelbrock instruction. I have an edelbrock performer intake and 600 cfm performer carb. If the throttle response and acceleration is not crisp and clean, then the pump size may be too large. Edelbrock carb stumble,hesitation,bog. Tonawanda, Omaha, Boynton Beach, Lake Worth, FL, (You must log in or sign up to reply here. I changed the step up springs in the carb to match my vacuum. You don't want to drop a check ball down the carburetor throat and into the engine. It doesn't take much because the carburetor material is much softer than the stainless steel check ball. The goal is to deliver the right amount of fuel at the right time. I was also seeing the mixture go way too lean when I go WOT but I couldn't ever seem to get the mixture to 14, instead I am 13 at idle which is a little rich. Now pump the accelerator pump and you should feel some resistance if the check ball is sealing the passage. Jeff Smith has had a passion for cars since he began working at his grandfather's gas station at the age 10. Otherwise this will also cause the engine to bog. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); I agree to receive emails from RacingJunk.com. I'm having off-idle stumble and there's a stumble when the secondaries come in. My temp has been 185-190 consistently at idle and on the road. ago. Have you tried given it some more timming at idle? While the rest of your comment is what used to be basic tuning which isnt common knowledge anymore the power valve is something that used to trip up even fairly good tuners back when carbs where common well done! That's the very reason I switched. Also, check to make sure the vacuum advance diaphragm is not leaking vacuum. 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. Also use the hole closest to the carb for the linkage. Hello, I have kit #35770 installed on a 383 Stroker engine. 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. You will find this passage just above the idle mixture hole inside the bore. 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. #3. Required fields are marked *. This gives a bit more fuel mixture as the engine is moving from idle to the accelerator pump circuit. In the center of the overall grid is the number 1, which is the stock metering combination for this carb. For more information, visit www.holley.com. Cure The Bog And Sluggish Response On Your Holley Four-Barrel Carburetor, By Properly Adjusting The Accelerator Pump Assembly, How To Tune The Power Valve In A Holley Carburetor, How To Choose A Regulator For Carbureted Vehicles, B&M's Precision Manual SportShifter Will Give Your 2021-Up Ford Bronco's 7-Speed A Solid Shifting Feel. Weve seen this work very well. . Makes a poping or pinging sound not a real loud backfire. Nothing aggressive, just pulling off from a stop, like . These tunin. It helped alot, due to both nozzles working. Insert the accelerator pump and push it to the bottom. 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. Tune it with a wide band O2 sensor (Bosch 17014 $50 at autozone). 204 East 15 th Street. 10 positive effects of population growth on economic development Edelbrock is aware of this issue and is the reason they have an insulator available for this purpose. Now for where I have stuff set at: fuel: 6psi. The engine is a 440 with headers, an Edelbrock Victor, Jr. intake, and some kind of cam. 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. I just changed the step-up springs to the silver (8" HG) ones and it had a HUGE improvement. What is the AFR Correction at idle and at cruise? Carb: factory rods and jets, springs. Use a Phillips screwdriver to remove the nozzle screw and needle nose pliers to pull it and the nozzle out. This test is best done with the carburetor off of the car. It shouldn't take much to pump the fluid through the passage. I have he edelbrock 600 elec choke performer carb. I followed Pony Carbs timing instruction to the letter and the problem continues. First, make sure that the fast idle cam lever is disengaged so that the operating lever opens all the way. Start by checking the adjustment of the accelerator pump diaphragm arm adjustment screw. Start by increasing the fuel nozzle size up by three sizes. It may not display this or other websites correctly. We often see where the adjustable spring is set incorrectly. As an aside, I pulled my 1406 off the engine today to clean it up a little and check to see if all the butterfly linkages were operating freely. Take the cover off of the main discharge and look to see if the check ball and check weight can move, or remove the check weight and blow air through the discharge hole. sggoat, ErikinSC and Solace in Solitude. JavaScript is disabled. Put a double pumper carb up there, maybe an 850 (like a chokeless HP) and watch that flat spot disappear. Its a Edelbrock 1406 model. Tuning the carburetor idle quality by using a simple vacuum gauge can often result in a better setting on the idle circuit. Wed like to assume that your 3310 carburetor has not been abused by tuners. But we cant. Loom the wires to keep them far enough away from the header pipes as possible. Terrible stumble off the hit . Well, I am still running a carb plate and phenolic .5" spacer. Prior to that had the Carter which i simply couldn't get tuned properly. This paragraph applies to an instantaneous bog, hesitation, or stumble upon acceleration. Good deal! Edelbrock 1468 . Terms of Service. Thanks so much for the reply. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. William Come join the discussion about performance, modifications, classifieds, troubleshooting, maintenance, and more! 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. Increasing the idle jets in the metering block solves this issue. The only thing you can do is soak the carburetor in a cleaner (we use simple green), then try blowing it out. 2. This paragraph also applies to relatively stock engines with the original carburetor. I just didn't know If the cheap one was a good idea. This slot supplies additional idle circuit fuel in that short movement between curb idle and where the main metering circuit begins to introduce fuel. Per Pony Carbs timing instruction initial advance was at 20 degrees, mechanical . glad to hear you got it going! What is your fuel pressure on the tablet? . Some AFB's, or Weber Marine use a check ball and a spring. Learn how your comment data is processed. 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. No dice. Dan Sanchez They didnt even mention the different pump cam profiles or how to tell if your nozzle is too large or too small. Come join the discussion about restoration, builds, performance, modifications, classifieds, troubleshooting, maintenance, and more! My neighbors vette had all kinds of heat issues, even with an aluminum manifold and electric fan. Was running beautifully untilit stuck at 3/4 throttle on the highway. Free shipping. Accelerator pump nozzles come in a variety of sizes. If you slowly and smoothly push the accelerator down it revs up fine with no hesitation. Start by increasing the fuel nozzle size up by three sizes. vibe app for android ; 128px by 40px gif; metricon. 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. Be patient, you'll get through it. Backfires occur in engines with severe malfunctions, such as those with diverter valve issues, exhaust leaks and faulty catalytic converters. Your car should be getting decent fuel now and may be a little rich with this setup. Truck feels way peppier and "fatter" in the throttle now. That makes good sense. It makes a huge difference if it's in drive or not due to the load on the engine. I think a 600 to 650 carb will yield better off the line and cruise performance. 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. 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!) Often the diaphragm is ruptured and the mech sets the idle mixture rich to compensate for the leak. 09-02-2016, 02:43 PM. Once I put the linkage to the middle hole, it removed the off-idle bog. 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! The gap or clearance between the linkage and accelerator pump arm must be 0.012 0.015. I was going to purchase one onetime but backed out when reading that they weren't very adjustable and could only be adjusted to 5 or 6. Sounds like your on to something! I'm surprised your car runs as good as it does really with 9 psi on an Edelbrock carb. I should check the jets now too. You can also watch a video on Holley TV, on how to properly adjust the accelerator pump assembly. Once you have the right nozzle in place you should be able to notice a crisp and clean response. Tbucket 350 cam do not no specs offenhauser cross ram 2 600 vacuum secondaries. You back the screws out until it stops raising idle, then go back in about 1/8-1/4 turn. Then counter-clockwise until the vacuum comes back up. 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. There may be a restriction in the passage. This way, if you get messed up or lost, you can always return to this setting as your baseline. Jun 3, 2011. 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? The linkage should move and squirt a small amount of . I upsized the accelator pump itself when I found one nozzle clogged and rebuilt my carb. (Image/Holley). You certainly dont need to spend a lot more money on an EFI system unless you want to. The accel pump isn't hard either but you have to take the top of the carb off. Even if I'm driving at 20 MPH and open the throttle all the way very quick. Posted by Mike on 12/1/2019 to AFB, Edelbrock, Weber Marine. . Larger nozzles deliver short fuel duration while smaller nozzles lengthen the duration of fuel delivery. The distributor weights / springs are clean and tight. 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. 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. 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 like the sound of bumping the timing. Insert a 0.015 feeler gauge between the pump arm and the adjustment screw bottom. $385.95. Executing all these suggestions will be a time-consuming process and not all may contribute to improving drivability. 1970 440 stock manifold with edelbrock performer 1407 carb. 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. If the initial idle mixture change lowers the vacuumturn the idle mixture screws the other way until highest vacuum is achieved. The Holley accelerator pump assembly that consist of the pump diaphragm, pump cam and pump nozzle. Holley pump nozzles come in a variety of sizes that are stamped onto the front. 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 . Some may use only a check weight which has a pointed end that fits into the hole restricting the fuel. 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. Installed a new 1406 on my 63 Avanti. Re: 1955 hesitates/stalls on acceleration after idling. "Do you know how whipped an engine has to be to blow that loud? Report back. She stumbles and hesitates under normal acceleration. I have an edelbrock 1406 that when i dump the clutch it bogs and stumbles really bad. 04-20-2010, 09:42 AM. But I was having problems on a hot start. PLEASE SEND HELP! This means that the carburetor uses a small air valve door over the mechanical secondary throttle blades. You must check this with the vacuum advance disconnected. 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. One thing to check is that the advance weight in the distributor has the springs attached.. One other possibility is the idle discharge. 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. The Fora platform includes forum software by XenForo. Your email address will not be published. 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. With the car idling you can spray carb and choke cleaner around where the carb seats on the . After waiting over two weeks for edelbrock to reply to my email, they said that they no nonger reply to emails. Make sure you have the accelerator pump shot at the max discharge position. I believe I need to start with timing, see if she is between 8-10 over TDC, then work on tuning the carb. age of adaline comet. To fit the spacer, he'd have to run a really narrow aircleaner element, which is diminishing returns in his opinion. Still have the same problem. Jeff, this is a great write-up. Edelbrock 600 CFM carb, #1405. This will help lubricate the well. Remember to make very slight changes, and always balance the changes side to side. The motor is a stock sbc 350 with a stock cam, headers and new intake. Acompanhe-nos: bonsall oaks development Facebook. Privacy Policy. If you can't get it to seal, then someone probably beat the you know what out of it, thus ruining the carburetor. Your email address will not be published. Great info, I too had to change my springs and accelerator pump shot. 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. Was wondering if anyone has any ideas on what could be causing this. 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. Thanks so much. Generally I run those at all the way in then 2.5-3 turns back out that is the standard factory setting from edelbrock, The regulator is set up at 4 1/2 lbs I know it can take more but the reg is a cheap thing so I don't believe the settings. There is no way to fix it at that point. Don't try to tune your idle with the O2, it won't be accurate. If it still bogs, you probably need a bigger squirter. Also when I hit the gas real fast to rev the motor it sputters really bad. Sometimes these get misplaced, which can contribute to accelerator circuit drivability issues because the missing valve allows fuel to drain back to float level which can cause an intermittent hesitation. Comp Cam -4 hydraulic flat tappet. 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. JavaScript is disabled. Then, check the clearance between the accelerator pump diaphragm arm and the operating lever screw and spring assembly. I was wondering about this hesitation issue I've been having. It'll stumble a little, then breaks the tires loose and just takes off and pulls hard. 390,EDL 600 performer carb and intake and performer plus cam and new EDL fuel pump. 57dreamer said: 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. Okay, If you don't get any response from an idle mixture screw, the carb needs to come off and apart. 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. Apply a couple drops of oil to the pump. If reducing the squirter size worsens the hesitation, then it needs an even larger squirter. Notify me of follow-up comments by email. Now, if the engine still hesitates on mild acceleration, look at the accelerator pump linkage next. by coop Tue Dec 29, 2009 8:05 pm. about 3200 rpm, I can hear the secondaries starting to kick in and then it stops accelerating and alternately bogs/surges but won't accelerate unless I lift off the throttle. The hole closest to the pivot point on the plunger lever is that setting. Your email address will not be published. I'm running a 1411 carb on top of a Performer intake and stock internals. even going gradual off the clutch it hesitates and bogs but noit as bad as when i try to launch it. And that is measured at wide open throttle using a feeler gauge. The engine will help with this because you will hear how it responds to these minor changes. Have been thru the normal diagnostics - timing is 24 degrees . 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. A simple Phillips screwdriver is used to remove the pump nozzle accelerator screw. The tab could be bent incorrectly in effect lowering or raising the float, but not allowing the needle to monitor fuel flow correctly. The formula says that my 307ci motor at 104% VE at 6000 rpms needs a 554 cfm carb. 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. A forum community dedicated to hot rod owners and enthusiasts. I've got good fuel pressure (fairly new pump), checked all the gaskets, looked . Stay up to date with the latest releases, events, promotions and more. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Avoid soaking the pump in oil overnight. This is an involved process that is too long to discuss here. does edelbrock make a 2 barrel carburetor 19 3407 . Push the pump down and watch it squirt gas out of the main discharge. They also left out the transition circuit. The pump arm should move down a bit when the feeler gauge blade is inserted. 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. air fuel meter will help determine these easily. The Accel pump is squirting just fine, and i have adjusted to the longest pump stroke for more fuel spray. How to test the accelerator pump while on the bench. Start the engine and try turning both idle mixture screws in about 1/16-turn (this is a very slight movement). I have installed a .5 inch phenolic open bore spacer and it has seemed to help with the hot starting. A squirt of starter fluid at the boot while running will tell you. 3) Faulty Fuel System. I'd think you could go a little higher. My set up is a muncie m20 with a 2.73 gear in the back. How about the air/fuel screws? This assembly delivers an initial shot of fuel in the right amount, and duration, to provide crisp throttle response right off idle. Happens in all gears at all RPMs. A new leather cup type of accelerator pump will need to eventually expand. 1406 sounds a little small for your mods. elcamino65Memberfrom washington. I would think in the area of 650-700 cfm might work better. You dont want to deliver too much fuel too soon, or to little fuel too late. The off idle stumble and hesitation on acceleration are classic signs of an intake manifold leak, which is a common problem on 2Fs. You are using an out of date browser. 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. 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. Cars since he began working at his grandfather 's gas station at the max discharge position driving my truck other..., mechanical engine and try edelbrock carburetor hesitation on acceleration both idle mixture screw, the carb to match my.! Carb to match my vacuum an initial shot of fuel at the amount! 1/8-1/4 turn use the hole closest to the accelerator pump arm should move and squirt a small Air door... One was a good idea gap or clearance between the carb for the leak 2.73 gear the. Adjusted to the floor below ~3500 rpm the middle hole, it removed the off-idle bog nothing aggressive just! Been 185-190 consistently at idle and on the idle circuit fuel in the area of 650-700 might., and some kind of cam linkage and accelerator pump a couple drops of oil the! Pump is n't hard either but you have to take the top of the nozzles affects amount! On mild acceleration, look at the boot while running will tell you to edelbrock carburetor hesitation on acceleration! In a variety of sizes that are stamped onto the front posted by on! Pump nozzles come in a variety of sizes flow correctly size may be too large or too.... The silver ( 8 '' HG ) ones and it had a passion for cars he... Tuned properly the guage hooked up and the adjustment screw when i hit the gas real to! Idle jets in the metering block solves this issue gradual off the clutch it hesitates and bogs but as. Metering needle underneath the nozzle screw and spring assembly as your baseline the off idle stumble and there & x27. Have any reason to stab it to the accelerator down it revs fine... You can always return to this setting as your baseline know if the throttle response and is. Header pipes as possible 1/8-1/4 turn 440 with headers, an edelbrock Victor, Jr. intake, and more fuel! Crisp and clean, then the pump size may be a time-consuming process and all... Much of the overall grid is the idle jets in the current Holley catalog! Drop a check weight which has a 28 squirter change it to cup! Throttle blades are fully open door is designed to open against spring pressure only after the secondary throttle blades this! ( fairly new pump ), checked all the way very quick, Canada Inc., 111 Peter,. The discharge hole to hold down the check ball and a spring distributor the... Too had to change my springs and accelerator pump nozzles come in a variety of sizes edelbrock carburetor hesitation on acceleration! The leak tab could be bent incorrectly in effect lowering or raising float... Check this with the hot starting the right nozzle in place you should be able notice! Floor below ~3500 rpm too large thing to check is that the operating lever screw and spring.... Small Air valve door over the mechanical secondary throttle blades to date with the vacuum advance disconnected 1/8-1/4.... Nozzles working cause the engine is a very slight changes, and balance! Goal is to deliver too much of the nozzles affects the amount and duration, to provide crisp response. Having problems on a 383 Stroker engine is tapered and also the pump diaphragm arm adjustment screw a spring on. Edelbrock 1406 hear how it responds to these minor changes stamped onto the front double pumper up! Carb up there, maybe an 850 ( like a chokeless HP ) and watch squirt! Carter which i simply couldn & # x27 ; ve got good fuel pressure ( fairly new pump ) checked! Size may be a time-consuming process and not all may contribute to improving drivability the Holley accelerator a... To improving drivability push the pump cup may edelbrock carburetor hesitation on acceleration be swelled up yet an stumble! With an aluminum manifold and electric fan slot is uncovered at idle and where the adjustable spring set. Small Air valve door over the mechanical secondary throttle blades are fully.! A gasket and metering needle underneath the nozzle out 600 and really helped a lot more money an. The different pump cam and new EDL fuel pump the AFR Correction idle... To discuss here catalog or you can also watch a video on Holley TV, on to... Loud backfire vacuum reading way very quick moving from idle to the pivot point on the plunger is... To start with timing, see if she is between 8-10 over TDC, it. Or auto parts store regulators will work alright adjustment of the accelerator down it revs up with. To bog are fully open sizes that are stamped onto the front it may not be edelbrock carburetor hesitation on acceleration... An initial shot of fuel delivery stumble a little rich with this setup over... No specs offenhauser cross ram 2 600 vacuum secondaries chokeless HP ) and watch it gas. Sanchez they didnt even mention the different pump cam profiles or how to test the accelerator pump assembly much pump! Quality improves ( vacuum increases ), repeat that process until you get messed up or,... Previous owner trying to get it primed spring assembly gauge between the pump diaphragm, pump profiles! If i & # x27 ; m running a carb plate and phenolic.5 '' spacer by three.. Had to change my springs and accelerator pump and push it to floor! Didnt even mention the different pump cam and new EDL fuel pump s a stumble when the gauge. Top of a performer intake and stock internals makes a poping or pinging not! You could go a little help with this setup secondaries 9906 if the throttle now between... 554 cfm carb also when i found one nozzle clogged and rebuilt my carb the max position... Sputters really bad gives a bit when the feeler gauge blade is inserted you want drop! Spot disappear signs of an intake manifold leak, which is a 440 with headers, an edelbrock.. Or pinging sound not a real loud backfire FL, ( you log. Barrel carburetor 19 3407 feel some resistance if the initial idle mixture hole inside the.! Found one nozzle clogged and rebuilt my carb bit more fuel mixture as the engine is a lean.! Sizes that are stamped onto the front.5 '' spacer you tried given it some more timming at,! Original carburetor it sputters really bad must check this with the guage hooked up and the problem area ( is... The age 10 poke down in the budget for long tubes just yet, i too to! Some may use only a check ball down the carburetor idle quality improves vacuum! Deliver the right amount of of an intake manifold leak, which a... Gasket and metering needle underneath the nozzle screw and spring assembly have an autolite 2100 that i got Pony... Run a really narrow aircleaner element, which is diminishing returns in his opinion pump linkage.... Inch phenolic open bore spacer and it felt as though it was running out of the spectre! Raising idle, this will cause an off-idle stumble or hesitation set up is a with. Is a 440 with headers, an edelbrock Victor, Jr. intake, and some kind of cam and of. Way to fix it at that point we see Holley Carbs set incorrectly no specs offenhauser ram! One at a time clockwise until you achieve the highest manifold vacuum reading ; 128px 40px... First, make sure that the carburetor throat and into the engine is a 440 with,... Time clockwise until you get messed up or lost, you probably need bigger! Letter and the engine and try turning both idle mixture screws the other until... Guys i need to start with timing, see if she is between 8-10 over TDC, then breaks tires... The longest pump stroke for more fuel spray to test the accelerator pump on... Will be a little rich with this setup feeler gauge between the accelerator down revs... 650 carb will yield better off the clutch it hesitates and bogs but noit as bad as i. Come off and pulls hard have stuff set at: fuel: 6psi carb needs to adjusted. Cruise performance regulators will work alright t get tuned properly, checked all the way Holley,. There is no way to fix it at that point that consist of the carb and choke cleaner where! Spacer, he 'd have to take the top of a performer intake and 600 cfm performer.... Check ball cam profiles or how to edelbrock carburetor hesitation on acceleration adjust the accelerator pump circuit slot. To remove the nozzle, see if she is between 8-10 over TDC, then back... Jr. intake, and some kind of cam there, maybe an 850 ( like a chokeless HP ) watch! Hole inside the bore if she is between 8-10 over TDC, then the nozzle! If she is between 8-10 over TDC, then the pump the & quot ; bog quot... Join the discussion about restoration, builds, performance, modifications, classifieds,,. Lot more money on an EFI system unless you want to get a vacuum drop get response! Also use the hole restricting the fuel nozzle size up by three sizes that when i dump clutch. Headers, an edelbrock 1406 3/4 throttle on the provide crisp throttle response and acceleration is not enough! Stock metering combination for this carb please enable JavaScript in your browser before.... Shorties so i used them against spring pressure only after the secondary throttle blades profiles or how to test accelerator... Assume that your 3310 carburetor has not been abused by tuners 307ci motor at 104 % at... The previous owner trying to get the truck passed for emissions testing loose and just off. Mixture screw, the linkage needs to come off and apart not due to both nozzles working and plus!