I had the hesitation when accelerating. Watched the video and then moved the accelerator pump rod to the top hole and now it's GREAT! 350 Chevy - 400 hp. ** THANK YOU **
I am in the final stages of tuning a 1405 on a 302 and experienced the same issue described in this video. For me the fix was to remove absolutely ALL play in the linkage, by adjusting the bend angle, so that the accelerator pump is activated immediately when the throttle is depressed.
Super helpful. In idle I'd blip the throttle and it would have that hesitation you described. I moved the accelerator linkage to the top hole and that provided a bigger squirt of fuel until the main jets could take over.
Richard, the next step and the only way to cure the idle mixture screw to become responsive is to remove the top lid from the main body and re-adjust the float level. Make sure you use a 7/16" drill bit as a measuring tool and you want it to slide or roll under the float HALF WAY before the bit raises the float. The idle screw will now become adjustable again.
My edlebrock hesitated while just tipping the throttle for years, nothing I tried worked. NOW it is FIXED after looking carefully at the throttle butterflies and found the 4 screws loose. So I made sure the butterflies can fit perfectly in the completely closed position then tighten screws very firmly. Now the idle stays put and it drives like a fuel injection engine. Perfect tip in but I wish I would have found this problem 10 years ago. Even if your screws are not loose the butterflies can still be center better than edlebrock's assemblers. FYI even though my screws were loose they can't fall in your engine. I'm not sure how but I tried to take my screws out but they got harder to turn so I left them in and tried to use lock tight the best I could. Can't hurt. Good luck.
There are other ways to improve off idle hesitation, lighter step up springs, larger squirter/nozzle, smaller larger number on metering rod. Also initial distributor timing plays a roll in all of this.
Also with a bigger cam, change out to a heavier spring. In my case I used the silver spring from the strip kit. Now I have a slight hesitation while driving. So next is leaner, or richer jeys, and rods.
I have my 1405 on my 289 set to the top whole is it's VERY responsive... I've been have a stumble or rpm drop on braking and turning though, I'm guessing a float adjustment is needed... just not sure which way to go with it...
Just to set the record straight. Edelbrock Carburetors are NOT made by Carter. They have up until last year been built by Magnetti Marelli/Weber USA, here in the USA. The division which has been subsequently purchased by Edelbrock, LLC. The Edelbrock Carburetor was originally based on the Carter design but was re-designed with more efficient booster clusters back in 1989.
68 chevy c30 327 manual had a horrible bog and stumble, replaced it with a new manual choke edelbrock. Installed, adjusted idle, and ran like a bat outa hell. Then about a mile down the road it started stumbling and bogging horribly. Now I can't even get out of my driveway it bogs and stumbles so bad. Cap, plugs, coil, wires are all new. Timing at idle is at 15 degrees. Idles and revs then randomly dies. No vacuum leaks. I'm thinking it's bad gas
I have a hopped up Chevy K10 with a 350 and Edelbrock 1403 carb. When I first had the truck I could smash the gas and burn rubber. The tail end would slide out too. After being able to do that a few times, it stopped having that initial punch of power. Now it just slowly builds from a stop. It's like I didn't even floor it at all. What's weird is that on the highway the secondaries snap open just fine. They won't do it from a stop though. What's my issue?
To be honest. I hardly drive my 63 with 327 small block 1406 edlebrock carb. I can get it to start with starter fluid. But would die out. The bowl shows gas. But still dies out? Is it a bad floater ? Thank you in advance.
My problem is my gaspedal. When i put my foot to it very gently it will take off normaly but when I push just a little bit harder past the tough spot it will slam down and give way too much gas. Cable/lever seem to be running free. Ever heard of this problem before?
Hello, I have a 1406 on a stock SBC 350 and I have stubble gurgle only when taking off from a dead stop otherwise the engine idles and runs the best it has ever run, any thoughts? Thanks.
The idle air mixture screw on the drivers side doesnt seem to work. Ive tried blowing it out with compressed air and sprayed carb cleaner in the hole with the idle air mixure screw out and blown it out with compressed air again, and still doesnt adjust. Any suggestions?
Ok-I'm in desperate need of help!! Got 351C with edelbrock 650 Thunder AVS. Secondaries will not mechanincally open at WOT. Looks like there is a linkage or some sort of cam that hangs loosely on drivers side of carb that hangs up secondaries from opening?? Can this cam be removed? What is its purpose-it just hangs loosely?? Its a 73 mustang with fmx trans and I used correct throttle adapter.
I have a problem..SBC 355 10.2:1 comp edelbrock performer rpm top end and i go to smash the Gas and it has a dead spot then sometimes lights the tire up or sit there and dhdahdahhh vroooom..Idk iv tryed everything 600cfm dosent work and 750 dosent work...same thing out of both of them...and rev s slow, and if i smash the gas hard it sounds like it shut off and revs up ...fucked up
@@Juan-js7ot this was my old motor lol the sob blew up on the highway snapped the crank in half I no longer trust engines other people build unless it’s a reputable shop or crate motor because you never know what kind of idiot “rebuilt it” she’s scoots on down the road now tho lol
Hope someone can help me. Got a rebuilt 351C with edelbrock 650. Was running and then a stumble/hesitation appeared at idle, it was idling rough. Now engine will not remain running at idle? Runs rough with accelerator held, but dies immediately at idle. Is this carbuerator issue? Changed fuel filter-fuel is new and was treated with Stabil 360. Removed Idle air mixture screws and blew air through circuit and changed fuel filter with no success. Is it possible something is clogged? If so, how do I fix this. Carb is less than a year old and only has about 700 miles on it.
+John Bond John, maybe this will help. I had almost the same problem. I had to adjust the floats. Both were bent out of adjustment causing all kinds of problems. There is a video on You Tube for Edelbrock float adjustments. I hope this helps.
Thanks so much for the reply and advice. Turned out not to be fuel at all. I installed a generic version of an MSD distributor and the pin that holds the gear broke and gear spun, causing the timing to be completely out. Have since installed an MSD distributor and all is well.
Need help. I’m running an Edelbrock carb on my 289 with a c4 auto . Runs perfect. However, when sitting at idle or slowly cruising, it I punch the gas, it has a massive hesitation bog or sometimes cuts the engine off completely. I’ve made it this far to this video. Should I adjust the acceleration pump to the larger setting even though it’s only a 289? Or should I be looking elsewhere, like timing?
I put an edelbrock 650 on my ALL original 69 Super Bee 383.. They recommended the AVS2 650 CFM. Back fires through carb all the time. Tried moving accelerator pump rod, new plugs, fully charged battery. Theres a Reason why Edlebrocks are considered JUNK.. I wasted $400 on this carb because it fit my stock application without moving things around. Ill send it back to Summit and buy a Holley. Im OK with having to move my coil, use braided fuel lines etc to have my car run right.. Totally disappointed in the Edelbrock carb. Even ona 335 HP stock engine..
Im having trouble with my 350. Runs good when u give it gas but it idles like shit and stalls out. Looks like the throttle body is sticking closed and causing it to starve for gas. Idles good when in motion at speed limit but when moving slow it idles rough dies or stalls out unless u give it more gas can anybody help i have a video and on how it acts.
I have an avs 650 on my 350, it's doing the same thing, but will also sometimes do it randomly under a more moderate acceleration, brand new carb. Pump arm in the middle hole. Any suggestions? Runs good idling, runs good cruising.
@@EdelbrockUSA I did that an it fixed it, I also had to adjust the mixture screws a little bit I was pretty lean I believe it's running great now, thank you
I had the hesitation when accelerating. Watched the video and then moved the accelerator pump rod to the top hole and now it's GREAT! 350 Chevy - 400 hp. ** THANK YOU **
I am in the final stages of tuning a 1405 on a 302 and experienced the same issue described in this video. For me the fix was to remove absolutely ALL play in the linkage, by adjusting the bend angle, so that the accelerator pump is activated immediately when the throttle is depressed.
Super helpful. In idle I'd blip the throttle and it would have that hesitation you described. I moved the accelerator linkage to the top hole and that provided a bigger squirt of fuel until the main jets could take over.
Richard, the next step and the only way to cure the idle mixture screw
to become responsive is to remove the top lid from the main body and
re-adjust the float level. Make sure you use a 7/16" drill bit as a
measuring tool and you want it to slide or roll under the float HALF WAY
before the bit raises the float. The idle screw will now become
adjustable again.
Awesome! Fixed my rough idle issue and hesitation on my 81 c10
My edlebrock hesitated while just tipping the throttle for years, nothing I tried worked. NOW it is FIXED after looking carefully at the throttle butterflies and found the 4 screws loose. So I made sure the butterflies can fit perfectly in the completely closed position then tighten screws very firmly.
Now the idle stays put and it drives like a fuel injection engine. Perfect tip in but I wish I would have found this problem 10 years ago.
Even if your screws are not loose the butterflies can still be center better than edlebrock's assemblers.
FYI even though my screws were loose they can't fall in your engine. I'm not sure how but I tried to take my screws out but they got harder to turn so I left them in and tried to use lock tight the best I could. Can't hurt. Good luck.
There are other ways to improve off idle hesitation, lighter step up springs, larger squirter/nozzle, smaller larger number on metering rod. Also initial distributor timing plays a roll in all of this.
Edelbrock USA is there a number I could reach you or were are you located at ?
How do you adjust that accelerator pump?
Move the pump link up to the top hole, closest to the top of the
careburetor.
well now i know why mine was doing that, Thanks for the tips!
Also with a bigger cam, change out to a heavier spring. In my case I used the silver spring from the strip kit. Now I have a slight hesitation while driving. So next is leaner, or richer jeys, and rods.
I have my 1405 on my 289 set to the top whole is it's VERY responsive... I've been have a stumble or rpm drop on braking and turning though, I'm guessing a float adjustment is needed... just not sure which way to go with it...
well fuck. thanks for showing how to adjust it.
Just to set the record straight. Edelbrock Carburetors are NOT made by Carter. They have up until last year been built by Magnetti Marelli/Weber USA, here in the USA. The division which has been subsequently purchased by Edelbrock, LLC. The Edelbrock Carburetor was originally based on the Carter design but was re-designed with more efficient booster clusters back in 1989.
Edelbrock USA were are you located at ?
really simple and helpful... thanks!
What is your distributor timing at? We suggest 10-14 initial minimum.
My oil smells like gas. I have a 750 performer. Idle's fine, throttle response great. plugs look like it's running rich. What would you recommend.
68 chevy c30 327 manual had a horrible bog and stumble, replaced it with a new manual choke edelbrock. Installed, adjusted idle, and ran like a bat outa hell. Then about a mile down the road it started stumbling and bogging horribly. Now I can't even get out of my driveway it bogs and stumbles so bad. Cap, plugs, coil, wires are all new. Timing at idle is at 15 degrees. Idles and revs then randomly dies. No vacuum leaks. I'm thinking it's bad gas
I have a hopped up Chevy K10 with a 350 and Edelbrock 1403 carb. When I first had the truck I could smash the gas and burn rubber. The tail end would slide out too. After being able to do that a few times, it stopped having that initial punch of power. Now it just slowly builds from a stop. It's like I didn't even floor it at all. What's weird is that on the highway the secondaries snap open just fine. They won't do it from a stop though. What's my issue?
To be honest. I hardly drive my 63 with 327 small block 1406 edlebrock carb. I can get it to start with starter fluid. But would die out. The bowl shows gas. But still dies out? Is it a bad floater ? Thank you in advance.
What if you not getting ay squirt at all any thoughts woukd be helpful
Ty bud I fixed my stumbleling carburetor
My problem is my gaspedal. When i put my foot to it very gently it will take off normaly but when I push just a little bit harder past the tough spot it will slam down and give way too much gas. Cable/lever seem to be running free. Ever heard of this problem before?
Do u have a mopar?
I have the same issue.
I have an issue with it bogging at WOT. Does anyone have any thoughts at all? Carter Carb
Hello,
I have a 1406 on a stock SBC 350 and I have stubble gurgle only when taking off from a dead stop otherwise the engine idles and runs the best it has ever run, any thoughts? Thanks.
Please call our tech line. Tech Line Only: 800-416-8628
Mine was doing this as well. Did you ever find a solution
i have a 350 small block with 1406 edlebrock idles good goes into gear alright but when i give it barely any gas in gear it stalls out or surges
Please call our Tech Line. Tech Line Only: 800-416-8628
The idle air mixture screw on the drivers side doesnt seem to work. Ive tried blowing it out with compressed air and sprayed carb cleaner in the hole with the idle air mixure screw out and blown it out with compressed air again, and still doesnt adjust. Any suggestions?
adjust float
Ok-I'm in desperate need of help!! Got 351C with edelbrock 650 Thunder AVS. Secondaries will not mechanincally open at WOT. Looks like there is a linkage or some sort of cam that hangs loosely on drivers side of carb that hangs up secondaries from opening?? Can this cam be removed? What is its purpose-it just hangs loosely?? Its a 73 mustang with fmx trans and I used correct throttle adapter.
+John Bond Call our tech line. 800-416-8628
Ok so what am I checking ?
I have a problem..SBC 355 10.2:1 comp edelbrock performer rpm top end and i go to smash the Gas and it has a dead spot then sometimes lights the tire up or sit there and dhdahdahhh vroooom..Idk iv tryed everything 600cfm dosent work and 750 dosent work...same thing out of both of them...and rev s slow, and if i smash the gas hard it sounds like it shut off and revs up ...fucked up
That’s exactly the same with me I’ve tried wverything
My 86 k10 has a 350 and it bogs or hesitates only when I floor it from a dead stop pls help do you think this is it I have a fresh motor and new carb
Please contact our tech department. Tech Line Only: 800-416-8628
So what happened
@@Juan-js7ot this was my old motor lol the sob blew up on the highway snapped the crank in half I no longer trust engines other people build unless it’s a reputable shop or crate motor because you never know what kind of idiot “rebuilt it” she’s scoots on down the road now tho lol
But do I need more or less you didn’t get into it
Hope someone can help me. Got a rebuilt 351C with edelbrock 650. Was running and then a stumble/hesitation appeared at idle, it was idling rough. Now engine will not remain running at idle? Runs rough with accelerator held, but dies immediately at idle. Is this carbuerator issue? Changed fuel filter-fuel is new and was treated with Stabil 360. Removed Idle air mixture screws and blew air through circuit and changed fuel filter with no success. Is it possible something is clogged? If so, how do I fix this. Carb is less than a year old and only has about 700 miles on it.
+John Bond John, maybe this will help. I had almost the same problem. I had to adjust the floats. Both were bent out of adjustment causing all kinds of problems. There is a video on You Tube for Edelbrock float adjustments. I hope this helps.
Thanks so much for the reply and advice. Turned out not to be fuel at all. I installed a generic version of an MSD distributor and the pin that holds the gear broke and gear spun, causing the timing to be completely out. Have since installed an MSD distributor and all is well.
John, You are welcome. That was a interesting find.
Need help. I’m running an Edelbrock carb on my 289 with a c4 auto . Runs perfect. However, when sitting at idle or slowly cruising, it I punch the gas, it has a massive hesitation bog or sometimes cuts the engine off completely. I’ve made it this far to this video. Should I adjust the acceleration pump to the larger setting even though it’s only a 289? Or should I be looking elsewhere, like timing?
Please call our tech line. Tech Line Only: 800-416-8628
What fixed it I'm having the exact same problem with the same setup as you
Shepherdpie haven’t fixed it yet, nor called the hotline. I’m thinking I’m going to adjust the accelerator pump
I'm about to try it too because it either the accelerator pump or I'm not getting enough fuel pressure
@@shepherdpie119 with todays gas accel pumps and their cups don't last long same issue gonna change the pump out
I put an edelbrock 650 on my ALL original 69 Super Bee 383.. They recommended the AVS2 650 CFM. Back fires through carb all the time. Tried moving accelerator pump rod, new plugs, fully charged battery. Theres a Reason why Edlebrocks are considered JUNK.. I wasted $400 on this carb because it fit my stock application without moving things around. Ill send it back to Summit and buy a Holley. Im OK with having to move my coil, use braided fuel lines etc to have my car run right.. Totally disappointed in the Edelbrock carb. Even ona 335 HP stock engine..
How do you really feel????
all this yapping to say its an accelerator pump
Im having trouble with my 350. Runs good when u give it gas but it idles like shit and stalls out. Looks like the throttle body is sticking closed and causing it to starve for gas. Idles good when in motion at speed limit but when moving slow it idles rough dies or stalls out unless u give it more gas can anybody help i have a video and on how it acts.
Call our tech department. Tech Line Only: 800-416-8628
haha
I have an avs 650 on my 350, it's doing the same thing, but will also sometimes do it randomly under a more moderate acceleration, brand new carb. Pump arm in the middle hole. Any suggestions? Runs good idling, runs good cruising.
Try switching the accelerator pump arm to the highest setting. That would be the hole closes to the pivot point.
@@EdelbrockUSA I did that an it fixed it, I also had to adjust the mixture screws a little bit I was pretty lean I believe it's running great now, thank you