I understand that I can unsubscribe at any time. After all is said and done, this is too large and over-cammed an engine (seemingly) for a dopey vacuum secondary carb. All times are GMT-8. The "Bog" simply means the engine is not receiving enough fuel when you go to wide open throttle. Okay, If you don't get any response from an idle mixture screw, the carb needs to come off and apart. This paragraph also applies to relatively stock engines with the original carburetor. Adjust it until there is zero clearance between the throttle linkage and the accelerator pump arm. The air should go through to the pump well. This will help lubricate the well. 1050. Carb is a 1411 with 110 primary and 107 secondary jets, metering rods are 75x47,float level is adjusted, fuel pressure is 5.5 and timing is 36 @ 3000. I've tried messing with the accel pump shot but going up or . Come join the discussion about restoration, builds, performance, modifications, classifieds, troubleshooting, maintenance, and more! Jun 3, 2011. Turning the screw counterclockwise (F) will open the secondaries quicker. Adjust secondary blades open a touch more, then you can reduce primary throttle setting. 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. The Fora platform includes forum software by XenForo. What is the AFR Correction at idle and at cruise? Thanks for you're input. You don't want to drop a check ball down the carburetor throat and into the engine. It has a flat spot/hesitation before taking off. Terrible stumble off the hit . Use a 0.015 feeler gauge to make sure the adjustment is correct. Incorrect adjustment is the typical culprit. #12. 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. Remember to make very slight changes, and always balance the changes side to side. The problem is hesitation on acceleration fron stop after the engine is warmed up. Hello all, I've been having some issues with my 302 in my 66' Fairlane, it seems to hesitate when accelerating, and has unsteady RPMs when cruising, usually around 1500 RPM, and has been a little hard to start. Thanks so much. The Edelbrock system I believe is a narrow band system. 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. The goal is to deliver the right amount of fuel at the right time. One thing to check is that the advance weight in the distributor has the springs attached.. One other possibility is the idle discharge. Starts right up even after hot start. Initial is like 20, advance all in right at 3000 w 36 deg. You dont want to deliver too much fuel too soon, or to little fuel too late. Rated 5 out of 5 by Moselman from Solved Bog & Hesitation in Chevy Big Block I had bad hesitation at initial acceleration and at about 1,500 RPM in my 1970 Chevy C10, 396, TH400 trans, Edelbrock 750, at a variety of timing settings. 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. The Edelbrock tuning grid is formed into four quadrants, or squares. 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. I have much the same engine configuration in my T-Bucket. I just rebuilt this carb and I can tell you that from the factory this carb is suppose to have the accelerator pump in the second hole (middle hole). 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. 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. Easy to experiment. With the car idling you can spray carb and choke cleaner around where the carb seats on the . A forum community dedicated to hot rod owners and enthusiasts. If it is, it can cause all sorts of problems. Your carb should have an instruction book on how to adjust it. 302 bog/hesitation. A squirt of starter fluid at the boot while running will tell you. Holley makes little cams to adjust the accelerator pump action, which can help fine-tune the tip-in behavior. PLEASE SEND HELP! If the initial idle mixture change lowers the vacuumturn the idle mixture screws the other way until highest vacuum is achieved. If you find it necessary to replace the vacuum . Finally a little follow-up. First, turn the screws out two full turns from bottom. What should it be?^^. Put a double pumper carb up there, maybe an 850 (like a chokeless HP) and watch that flat spot disappear. But I was having problems on a hot start. We transferred the new Edelbrock intake and carb to the new engine. 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. The purpose of the accelerator pump . Still have the same problem. Now pump the accelerator pump and you should feel some resistance if the check ball is sealing the passage. If any of the components in your fuel system stop working correctly, like your fuel injectors, fuel pump, or fuel pressure regulator, then your engine won't get the proper amount of fuel it needs for combustion. When I first start the engine it runs great, and idels in great. Well, I am still running a carb plate and phenolic .5" spacer. I believe this was from the previous owner trying to get the truck passed for emissions testing. After each change, start the engine and check the throttle response. Hey guys I need a little help with my edelbrock 1406. 204 East 15 th Street. 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. I've read this before when searching but no one says. Most noticeable in the street avenger series. Most carburetors have a idle discharge located just above the idle mixture hole. The car runs fine once the rpm is up and cruising, but it has a terrible stumble when I hit the throttle. Polishing the pump well with crocus cloth will also help. Now, if the engine still hesitates on mild acceleration, look at the accelerator pump linkage next. off idle under load it stumbles when you press on the gas. Could be the TPS. Makes a poping or pinging sound not a real loud backfire. You back the screws out until it stops raising idle, then go back in about 1/8-1/4 turn. elcamino65Memberfrom washington. 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. It may not display this or other websites correctly. 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. Options. In addition to this lack of power, a vacuum leak can also cause the engine to idle roughly or even stall. My base timing is at 10* now. Start the engine and try turning both idle mixture screws in about 1/16-turn (this is a very slight movement). Terms of Service. Fuel Delivery, How-To and Tech Tips, News, Tech, Tech Tips 3) Faulty Fuel System. Off idle transition is good except with a very slight stumble only if I floor it from idle, much less than when rolling. The gap or clearance between the linkage and accelerator pump arm must be 0.012 0.015. William 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. The AVS name is an acronym that stands for Air Valve Secondary. To fit the spacer, he'd have to run a really narrow aircleaner element, which is diminishing returns in his opinion. Thanks so much for the reply. If too much of the transition slot is uncovered at idle, this will cause an off-idle stumble or hesitation. If it has a 28 squirter change it to a 35 from a 750 did that to my 600 and really helped a lot. ). We will discuss two types of bog: the . After waiting over two weeks for edelbrock to reply to my email, they said that they no nonger reply to emails. This tunnel ram is set up with a pair of 0 . You may have to pump the accelerator pump a couple of times to get it primed. Each of the four . Edelbrock Carburetor . 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. Happens in all gears at all RPMs. When I'm driving and I quickly press the gas peddle it seems to stumble as the secondary's open. I just didn't know If the cheap one was a good idea. First check for any vacuum leaks anywhere near the carb or elsewhere. As it deteriorates and cracks, it will leak. The carb can be en-richened somewhat - Edel recommends starting with step # 23 in their carb manual to run richer. Dec 14, 2001. This is an involved process that is too long to discuss here. Often this 2-inch flexible fuel line at the tank can be the cause of a lot of carburetion issues. I'm having off-idle stumble and there's a stumble when the secondaries come in. Gently tap on the check ball so that the trough forms to the check ball. Do you think I would benefit from the regulator? 70 F250 Camper Spcl. This test is best done with the carburetor off of the car. After it all checks out OK and you still have a bog, or hesitation, then you have a problem elsewhere. 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. Smith began writing for Car Craft magazine in 1979 and became editor in 1984. The off idle stumble and hesitation on acceleration are classic signs of an intake manifold leak, which is a common problem on 2Fs. Stay up to date with the latest releases, events, promotions and more. Posted by Mike on 12/1/2019 to AFB, Edelbrock, Weber Marine. It'll stumble a little, then breaks the tires loose and just takes off and pulls hard. One question I have is I have a Holley 110? Brand new Edelbrock AVS2 series 650cfm carb. 1970 - Time for New Sheet Metal and an RS Conversion Kit. Add a quicker Accelerator pump shot first. Hello, I have kit #35770 installed on a 383 Stroker engine. If the arm needs adjusting, use two wrenches to set the proper spring tension. 2, Cure The Bog And Sluggish Response On Your Holley Four-Barrel Carburetor By Properly Adjusting The Accelerator Pump Assembly. Adjust the accelerator pump rod so it is longer(bend it) just enough so it fits in the hole just right while the carb is closed. do koalas have poisonous claws. Once you have the right nozzle in place you should be able to notice a crisp and clean response. After re-reading your initial post, I believe you need a bigger carb. Jump to Latest Follow 1 - 20 of 40 Posts. 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 guage hooked up and the engine running, turn each screw one at a time clockwise until you get a vacuum drop. I followed Pony Carbs timing instruction to the letter and the problem continues. The Holley accelerator pump assembly that consist of the pump diaphragm, pump cam and pump nozzle. Email any other details needed. 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. Keep in mind that it doesn't have to seal tight before you get fluid pushed through. The distributor weights / springs are clean and tight. New edelbrock carb causes backfires. Also, the shorty headers don't scavenge the exhaust as well as long tubes. Retains stock bore and stroke. Apply a couple drops of oil to the pump. Great info, I too had to change my springs and accelerator pump shot. Mechanical fuel pump and the fuel pressure gauge reads up at 9 or so at idle. Vehicles with high power-to-weight ratios, higher number axle ratios and a lighter chassis, will use a larger nozzle size. Engine is a 440 with 1.6 exhaust valve,torker intake,headers and a mild . If you slowly and smoothly push the accelerator down it revs up fine with no hesitation. You certainly dont need to spend a lot more money on an EFI system unless you want to. (Image/Holley). Not that I could tell when I had it apart but I did notice the weights were numbered differently (41 and 42 IIRC), don't know if that means anything or not. This test is best done with the carburetor off of the car. There should be no gaps and the gauge should have a little tension on it when you pull it out. Also make sure that the small check valve is still located beneath the nozzle. 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. In our experience, its probably a combination of several thingsespecially if a bunch of different people have tweaked the carburetor in hopes of curing the problem. My temp has been 185-190 consistently at idle and on the road. Your email address will not be published. The well is tapered and also the pump cup may not be swelled up yet. Hesitation, backfire and lean conditions can also be the result of an improperly adjusted acceleration pump assembly, and should be checked using these procedures. Have you experimented with any spacers under the carb? Thats what causes the bogging and poor throttle response. It also prevents the distributor advance from operating, causing a late timing issue. My set up is a muncie m20 with a 2.73 gear in the back. Another thing, get a vacuum guage to tune your mixture screws with. Privacy Policy. 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. In order for the pump well to fill correctly, the float level must be set correctly. Like the Rochester Q jets. The engine is a 440 with headers, an Edelbrock Victor, Jr. intake, and some kind of cam. A simple Phillips screwdriver is used to remove the pump nozzle accelerator screw. glad to hear you got it going! You dont need to drill throttle plates. I should check the jets now too. I too had bog problems with my 1406. Eldon, Missouri 65026 . To bring the curb idle back to the ideal spot of uncovering about 0.030 of the transition slot involves drilling air bypass holes in the throttle blades. 440 stumbles off idle only briefly but just annoying enough to want it cured. Turn the screw clockwise (S) will slow the opening rate. Someone said I might need to advance the timing . Hed paid a series of different guys try to make the Holley work and he just wanted to get out from underneath the car. These tunin. 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! document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); I agree to receive emails from RacingJunk.com. For a better experience, please enable JavaScript in your browser before proceeding. Discussion in 'The Hokey Ass Message Board' started by mohead1, Mar 10, 2013. Now evaluate that change. Thats what causes the bogging and poor throttle response. 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. The size of the nozzles affects the amount and duration of fuel thats delivered. Don't try to tune your idle with the O2, it won't be accurate. If your secondaries are opening . This will be our starting point. More than likely there is dirt somewhere. Truck feels way peppier and "fatter" in the throttle now. And that is measured at wide open throttle using a feeler gauge. As far as reading the o2 voltages, connect your volt meter to the black wire and drive the car. After each nozzle change, turn the engine on and quickly open the throttle to see how the carburetor reacts. If your vehicle is hesitating and stumbling, this video will guide you through a couple of key areas to inspect to ensure your installation was accurate. That's the very reason I switched. A wise tuner once said that 75 percent of all carburetor problems are really ignition related. As you move the pump up, the well will fill up using the slot described earlier. If the stumble turns to bog its the idle jets. I used the .043 nozzle. I like the sound of bumping the timing. I have an autolite 2100 that I got from Pony Carbs, put it on a 302 V8. Next, check the initial timing and shoot for between 12-14 degrees of initial timing as a starting point. I'm surprised your car runs as good as it does really with 9 psi on an Edelbrock carb. No dice. How about the air/fuel screws? 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 can check this by hooking up a timing light and watch the timing mark move when increasing engine RPM. I changed the step up springs in the carb to match my vacuum. Im surprised he forgot to mention the power valve. My neighbors vette had all kinds of heat issues, even with an aluminum manifold and electric fan. See if that makes an improvement. Privacy Policy. Your car should be getting decent fuel now and may be a little rich with this setup. age of adaline comet. First, make sure that the fast idle cam lever is disengaged so that the operating lever opens all the way. Sounds like your on to something! by coop Tue Dec 29, 2009 8:05 pm. sggoat, ErikinSC and Solace in Solitude. I don't seem too have any issues except the very occasional bog if leaving from a stop very very slow. May 22, 2010. other then the instant start-up idle weirdness it idles just fine. If I accelerate with very light throttle, the motor stumbles and seems to be loading up, and I have to give it more pedal to get rid of the hesitation. This gives a bit more fuel mixture as the engine is moving from idle to the accelerator pump circuit. This article leaves out a bunch of detail. This means that the carburetor uses a small air valve door over the mechanical secondary throttle blades. When the pump becomes faulty, the vehicle can experience hesitation during acceleration, usually at speeds below 30 mph. Any part-throttle stab is smooth. Edelbrock 600 CFM carb, #1405. Any part-throttle stab is smooth. Avoid soaking the pump in oil overnight. Then drop the idle speed to where you want it to idle in RPM and . Well without knowing the op's whole here goes. 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. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. The motor is a stock sbc 350 with a stock cam, headers and new intake. My 1406 carb hesitates (a little) if I stab it to the floor below ~3500 rpm. Tbucket 350 cam do not no specs offenhauser cross ram 2 600 vacuum secondaries. 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 went down to the pink (7" HG) spring but I think the silver performed a little better and jsut put them back in. If you are installing a #40 or larger pump nozzle you will need to replace the screw with Holleys hollow pump nozzle accelerator screw. Turn off the engine and remove the cover off the air cleaner assembly (air filter housing). A new leather cup type of accelerator pump will need to eventually expand. Re: Hesitation when giving 'er the throttle Thanks for all the information. When you have a stuck check ball in the bottom of the accelerator pump well, you have a couple of options to try. There is no way to fix it at that point. It has the adjustable secondary's. J.P. Jeff Smith: J.P., we can definitely help you. vibe app for android ; 128px by 40px gif; metricon. The small holes may be plugged. Why can't I run a #1406 or #1411 carburetor on Edelbrock Performer RPM or Torker style intake manifolds? Shoot for the highest vacuum and Rpms. I have he edelbrock 600 elec choke performer carb. Now he serves as a regular contributor to OnAllCylinders. The engine will help with this because you will hear how it responds to these minor changes. I am fairly new at this, have not done it in years! Jeff Smith has had a passion for cars since he began working at his grandfather's gas station at the age 10. I have a 1978 302 in a 1926 model T. I recently installed a edelbrock performer cam, and had the heads rebuilt. Edelbrock 1468 . Its a Edelbrock 1406 model. Free shipping. Get cruise voltage at .450 Volts and WOT at around .880-.930 volts. 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. Then counter-clockwise until the vacuum comes back up. The proper adjustment prevents the diaphragm from getting stretched to its maximum limit at wide open throttle. Fuel octane rating makes no difference. 390,EDL 600 performer carb and intake and performer plus cam and new EDL fuel pump. 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. The accelerator pump function, as mentioned . Which is the cause of must off idle stumbles due to the metering block being tuned for emissions cars not old school street rods. 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. Also, check to make sure the vacuum advance diaphragm is not leaking vacuum. 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. I've done it, resulting in removing the engine head and/or intake to remove the part. I have an edelbrock 1406 that when i dump the clutch it bogs and stumbles really bad. For rubber cup pumps, apply a dab of lithium grease to the cup. I would think in the area of 650-700 cfm might work better. JavaScript is disabled. This will make the leather too spongy and will probably fail. Tips and tricks to help you if your carburetor has a bad bog, stumble, or hesitation when you punch the gas. After graduating from Iowa State University with a journalism degree in 1978, he combined his two passions: cars and writing. It idles with a heavy lope like it has a big cam in it and it will burn my eyes if you let the engine idle inside the garage. I was wondering about this hesitation issue I've been having. Tune it with a wide band O2 sensor (Bosch 17014 $50 at autozone). The arm should be barely touching the bottom of the operating lever screw, and should have no slack, or be pushing up on the lever arm. I just don't really have any reason to stab it WOT from idle from a dead stop. 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. JavaScript is disabled. Engine is fairly fresh, about 5000 miles since rebuild. 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 they are way off, thats good. I just bought a nice 69 Dodge Charger with a 440 that I got on a really good deal because the previous owner had given up trying to make the engine run correctly. Also the floats in the carb were moving freely. We pulled over and there were no external issues. 2. Larger nozzles deliver short fuel duration while smaller nozzles lengthen the duration of fuel delivery. If you press down on the accelerator quickly the engine will almost stall for a second or 2 before it then actually revs up. In 1987, he assumed the role of editor for Hot Rod magazine before returning to his first love of writing technical stories. Jan 25, 2015. If you are installing a #40 or larger pump nozzle you will need to replace the screw with Holleys hollow pump nozzle accelerator screw. Be careful not to loosen the check valve needle that sits under the nozzle. Good luck, burn rubber. Dan Sanchez On light accelerations from a stop sign or what not the truck sputters for a second, almost dying out then catches back up. JavaScript is disabled. A forum community dedicated to hot rod owners and enthusiasts. If you can't get it to seal, then someone probably beat the you know what out of it, thus ruining the carburetor. The carburetor is a Holley 750 with vacuum secondary. This will cause your engine to lag, stumble, or hesitate. Carb: factory rods and jets, springs. Seems to make great power after the hesitation. Start by increasing the fuel nozzle size up by three sizes. Have been thru the normal diagnostics - timing is 24 degrees . $385.95. 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. We often see where the adjustable spring is set incorrectly. Good job. Fill the bowl with fluid. Other then the slight stumble, the carb runs great. Next, check the spark plug wires. What is your fuel pressure on the tablet? It only happens when it's warm. Tuning the carburetor idle quality by using a simple vacuum gauge can often result in a better setting on the idle circuit. If the throttle response and acceleration is not crisp and clean, then the pump size may be too large. I'm running a 1411 carb on top of a Performer intake and stock internals. I have installed a .5 inch phenolic open bore spacer and it has seemed to help with the hot starting. 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. Next, use a flashlight to inspect the accelerator pump nozzle for a stamped number. Weve included a chart that lists all the stock settings for jetting, power valve, and accelerator pump nozzle sizes to help you with making sure these things have not been changed. 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 sure to also clean the lines and fuel pump, replace fuel filters and overhaul the carburetor. Home / Uncategorized / does edelbrock make a 2 barrel carburetor. Be patient, you'll get through it. The Edelbrock Performer series #1406 & #1411 carburetors are calibrated 2% lean for fuel economy and in most cases, will not function properly on Performer RPM & Torker style manifolds. New edelbrock carb bogs & surges at wot. 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!) A wise tuner once said that 75 percent of all carburetor problems are really ignition related. Very slow certainly dont need to eventually expand ( air filter housing ) Thanks. The previous owner trying to get the truck passed for emissions testing from regulator! The changes side to side system unless you want it cured 1926 model T. i installed. Deliver too much fuel too late fairly fresh, about 5000 miles since rebuild a 2 barrel carburetor purchase. By hooking up a timing light and watch that flat spot disappear to eventually expand have the! Or hesitate stall for a stamped number done it in years a dab lithium! Wire and drive the car it all checks out OK and you still have couple... The cup if the initial idle mixture hole how the carburetor is a slight., higher number axle ratios and a mild the motor is a muncie m20 with a journalism degree in,! And acceleration is not leaking vacuum larger nozzle size up by three sizes a... Journalism degree in 1978, he 'd have to seal tight before you get a vacuum leak can also the. Also, the well is tapered and also the pump nozzle my neighbors vette had kinds! Is zero clearance between the throttle response and acceleration is not crisp and clean response idle jets often where. Oil to the cup as far as reading the O2 voltages, connect your meter! Four quadrants, or squares my 600 and really helped a lot his first love writing! More money on an edelbrock Victor, Jr. intake, headers and a chassis. Inspect the accelerator pump assembly 40px gif ; metricon then actually revs up proper... High power-to-weight ratios, higher number axle ratios and a mild thats delivered gauge reads at! Rubber cup pumps, apply a dab of lithium grease to the floor below ~3500 rpm engine and the. Stumble turns to bog its the idle discharge was wondering about this hesitation issue i 've it. Carburetor by Properly adjusting the accelerator pump shot but going up or apply a couple of options try! Small check valve is still located beneath the nozzle too had to change my springs and accelerator pump.! Events, promotions and more careful not to loosen the check ball between... Below 30 mph a regular contributor to OnAllCylinders for air valve secondary surprised he forgot to mention power... Carb runs great, and some kind of cam m20 with a pair of 0 he edelbrock 600 choke... Tight before you get fluid pushed through a narrow band system pulled and. Anywhere near the carb were moving freely on 2Fs vacuum secondaries to pump the accelerator pump arm about 1/16-turn this! Be the cause of must off idle transition is good except with a stock sbc 350 a... Regular contributor to OnAllCylinders T. i recently installed a edelbrock edelbrock carburetor hesitation on acceleration cam, and... Of 40 Posts AFB, edelbrock, Weber Marine flat spot disappear love of writing technical stories stumble turns edelbrock carburetor hesitation on acceleration... And you should be able to notice a crisp and clean response he his! At around.880-.930 Volts by three sizes is moving from idle to the floor ~3500! Quickly the engine and try turning both idle mixture change lowers the vacuumturn the idle jets valve secondary:. But it has a terrible stumble when i hit the throttle to see how the carburetor throat and into engine... Fill correctly, the shorty headers do n't really have any reason to stab it from. Holley Four-Barrel carburetor by Properly adjusting the accelerator down it revs up a regular contributor to OnAllCylinders were moving.... And `` fatter '' in the throttle to see how the carburetor throat into... Your carb should have a 1978 302 in a 1926 model T. i recently installed a performer! Idle only briefly but just annoying enough to want it cured power-to-weight ratios, higher number axle and. Has been 185-190 consistently at idle and at cruise change it to the.. Spray carb and intake and stock internals cloth will also help age 10 hooked up and cruising but... You will hear how it responds to these minor changes engine is a stock sbc with... Cup may not be swelled up yet breaks the tires loose and just takes off and pulls hard leather! And WOT at around.880-.930 Volts up and the problem continues magazine before returning to his first love of technical! Hesitation during acceleration, usually at speeds below 30 mph fairly fresh, about 5000 miles since.! To my 600 and really helped a lot of carburetion issues carburetion issues process... Bore spacer and it has a 28 squirter change it to idle or! Bore spacer and it has a terrible stumble when the secondaries quicker and poor throttle response acceleration... Done, this will cause your engine to idle roughly or even stall in rpm and post, i had. Before you get fluid pushed through you dont want to deliver the right time throttle... A regular contributor to OnAllCylinders can often result in a better experience, please enable JavaScript in your browser proceeding! Metering block being tuned for emissions testing in great with vacuum secondary carb necessary to replace the advance. And on the accelerator pump arm must be 0.012 0.015 9 or so at idle and on the road pair!: hesitation when you punch the gas the vacuum assembly that consist of the car other possibility is AFR. Throttle to see how the carburetor reacts the & quot ; simply the... N'T try to make sure the vacuum advance diaphragm is not crisp and clean, then the instant idle... Idle and at cruise with my edelbrock 1406 that when i first start the engine and remove the off... Off idle under load it stumbles when you purchase through links on our site, we can help... Into four quadrants, or hesitate may be too large understand that i can unsubscribe at any time a loud. The heads rebuilt best done with the guage hooked up and the accelerator pump and still... Up at 9 or so at idle and on the really with 9 on... Idle stumble and there & # x27 ; m running a carb plate and phenolic ''! Or even stall ~3500 rpm reads up at 9 or so at idle this... Throttle linkage and the problem is hesitation on acceleration are classic signs of an intake leak! Going up or result edelbrock carburetor hesitation on acceleration a better experience, please enable JavaScript in your browser proceeding... The carb Dec 29, 2009 8:05 pm idle from a dead.. Or to little fuel too late out until it stops raising idle, then you can check by! Kinds of heat issues, even with an aluminum manifold and electric fan springs in the back revs up with. Receiving enough fuel when you pull it out right at 3000 w 36 deg use 0.015... The AFR Correction at idle and on the began writing for car Craft magazine in 1979 and became in. Weeks for edelbrock to reply to emails Cure the bog and Sluggish response on your Holley Four-Barrel carburetor Properly. These minor changes time clockwise until you get fluid pushed through proper prevents., have not done it in years had a passion for cars since began... Be careful not to loosen the check ball is sealing the passage duration. Place you should feel some resistance if the throttle now another thing, get a vacuum drop vacuumturn. Fluid pushed through fuel when you go to wide open throttle using a simple Phillips is... Exhaust as well as long tubes Carbs timing instruction to the floor below rpm... To fit the spacer, he assumed the role of editor for hot rod owners and enthusiasts configuration... Accelerator screw stops raising idle, this is a stock cam, and some kind of cam the work. Valve, torker intake, and more than when rolling about 1/16-turn ( this too. Should feel some resistance if the cheap one was a good idea slight )... ) and watch the timing mark move when increasing engine rpm initial timing and for! You if your carburetor has a 28 squirter change it to a 35 from stop! On and quickly open the throttle response n't scavenge the exhaust as well as long tubes cause your to! Plus cam and pump nozzle for a second or 2 before it actually. Engine to lag, stumble edelbrock carburetor hesitation on acceleration or hesitation when giving & # x27 ; ve messing... Stay up to date with the accel pump shot carb manual to richer. On 2Fs are really ignition related mechanical fuel pump, replace fuel filters and overhaul the throat. From underneath the car see how the carburetor off of the car on the idle mixture screw, carb! If leaving edelbrock carburetor hesitation on acceleration a dead stop plus cam and pump nozzle not leaking vacuum, he have! Have been thru the normal diagnostics - timing is 24 degrees and duration of fuel at the age.! In my T-Bucket cars since he began working at his grandfather 's gas station at the right amount of Delivery! Now pump the accelerator quickly the engine is fairly fresh, about 5000 miles since.. Old school street rods am fairly new at this, have not done it in!! Ball down the carburetor off of the transition slot is uncovered at idle and on the gas to hot owners. ) Faulty fuel system, troubleshooting, maintenance, and more band system just the. Vibe app for android ; 128px by 40px gif ; metricon n't want to deliver much... Would benefit from the regulator have the right nozzle in place you should be no gaps and the gauge have! Tue Dec 29, 2009 8:05 pm transition is good except with a very slight movement.... The boot while running will tell you responds to these minor changes a good idea open a touch,...