How to fix Bogging/hesitation when accelerating or hit WOT (wide open throttle) 

The set screw on the older Q-jets took a 3/32" allen wrench. Thanks for the video.

I was looking for this about 3 years ago.. gave up right before this video.. thank goodness I found it now!

the trick with a rochester quadrajet is to keep at least one or two extra carburetors. you grannie tune one for fuel economy and emissions if you're state or province mandates emissions testing. you keep that carburetor in a box and leave it in the trunk or shop bench. then you take an older quadrajet and you "school bus calibrated" slightly fatter mixture on primaries or idle mixture, then you find or make a set of secondary fuel rods that are like toothpicks on the tips. you can make the adjustments in small increments to achieve the right amount of mixture for wide open throttle. no little 750cfm square bore or double pumper should keep up with it. unless they knew how to tune it better than you

Exact issue I’m having you got yourself a new subscriber 👍🏾

The Pull Over Enrichment holes(POE) on YOUR carb model are also ABOVE the leading edge of the air doors. If you've made any performance mods other than your intake, you might also want to consider cutting two small semi-circular openings(the size of a pencil eraser) on the air doors by these holes. This will start the flow of air/fuel mixture thru the POE quicker as the air doors begin to open thus preventing bogs.

My 1995 Chevy 5.7 is having this issue, thanks for showing me this,, ill give er a try

The most simple explained and detailed way I've seen yet. Mad kudos my brotha. And thank you!!!!🔥🙌🏻🙌🏻🙌🏻🤘🏻🤘🏻🤘🏻

Nice video, i love learning about these old quadrajets. Also, your 76 is the same paint/interior trim as my 77.

So I have an 89 s1500 and I'm having the same kind of issue. Except its a tbi so I don't have back runners

Q-jet. I used to rebuild them. Took me around 40 minutes for a rebuild.

Well dah! I knew this over 50 years ago.

Looks like your accelerator pump lever is in the wrong hole. I’ve never seen one in the outer hole. I’ve only seen it in the inner position.

Helped a lot, thank you.

Thank u so much I have that same problem with my 1976 caprice so thank u

My 63 Impala Kills when I give it gas. Gonna give this a try.

Good job body Real knowledge professional demonstration

Great video!

just a tid bit for some folks “FORD” ran Quadrajet carbs. on some of their H O engines from tha factory 😎

This helped me out with my little Toyota 22R. Thanks!

Nice explanation!!!

My 84 El Camino with a 305 is doing this exact hesitation but I have a 4 bbrl edelbrock, ….what advice can you offer

heybthanks for these tips. something similar on my 61 d200 the spring wire that closes the flap broke and maybe i didnt have it set back right so inwill try that first

I got a 1978 Mercury Grand Marquis and its doing the same thing. It starts up and all that but once I accelerate or try to reverse, it stalls. I'll try this and hopefully it'll work.

i have this issue but opposite, when we floor it the pedal goes smoothly but when going slow it stutters and catches on something and then goes which make it (my truck) un-drivable, its a 72 C10 Chevy L6 250, we replaced the carb, the return springs and the throttle cable but now its giving me this issue where low rpm has a stutter (gas pedal alone) but flooring it no stutter at all, like the cable is getting stuck

wow i’m about to try this on my 81 El camino

great video

I have a 1993 Chevy S10 with a 350 swap well it was TBI and it bogs down but gets back up. Well we changed it to carburetor and it still has a bog down.

Lol that's a good way to explain. It blaahhh lol I understood what I meant !

My 76 nove with a qjet did the same but on my case was a baccum line for the ac component that was broken so guys check all your baccum lines

Good video

My car when driving on the high way when trying to speed up takes time like when I hit the gas pedal it doesn’t take off right away .. it’s delayed … and sometimes when I step on the gas pedal and my air is off I can feel the air coming through

Its a disservice to searchers when you use wot in that way

Cool, im still debating if i want to go carb or efi on my truck… i am wanting to get it running already so i may just have to bite the bullet and get it done

I have that same issue but only happens in drive while accelerating on my tpi 350 Chevy corvette, can’t figure out the issue , but I’m gunna check the throttle body again after watching this. But if it doesn’t work , would u have a suggestion for me??

I got a 01 Ford Expedition that makes that same noice when I hit the gas ima check that tomma

Pulled my air filter annnd the plates gone, just a couple sheared off screws ona bar, darn.

How much tension for a 4.3?

Many thanks

My issue with my 81 vette is the front one wont ever close. it barely moves at all.

I wonder if this works for the holley replacement for the quadrajet. I just picked up a '74 nova with a holley economaster carb on it and I've been going nuts trying to figure out the off idle bog issue. I even went and grabbed an edelbrock carb and weiand intake to swap.

It’s called aquadrabog for a reason.

The flathead screw feel like it’s free spinning and it doesn’t seem to be giving any tension to the flap

How about a '94 Mazda 323 carb?

very helpfull your video,i got a question my pick up does the same thing,,except is a diferent carburetor, dont has those screws,any idea to solve it? gmc sierra 94,,,

My 94 chevy caprice does that. And may cut off a stop signs and has to wait a while to start again. Could it be my throttle body or what could it be

I have the same problem but in a fuel injected mazda b2200 1990. Any idea what to look for since I don’t have carburetor?

My bad for hitting you with an insane amount of questions man.

Timeing needs set

U just fix my 4.3lx mercruiser that was doing this lol

My car shows code for catalytic converter I replaced the converter and o2 sensor but it still does when I stop and give it gas it's not showing any codes what so ever but catalytic converter

So just 1-1/2 turns and call it good? Is there room for performance tuning for different applications?

Would that work for a 2 barel carburator my choke plate is loose

I have the exact same problem on a electronic fuel injection engine. Any idea ?

I have a 383 stroker that will start and run down the road then will die. Have to let it sit a few mins and it starts runs then dies again. Any ideas?

i have the same ecaxt problem but mine is different than yours i don’t see any screws i see a spring on one side but there’s no tension any Suggestions

I notice there was a vacuum hose disconnected.

I know its far off but I got an 02 chevy Silverado 1500 with the same issue when I accelerate hard but not under normal driving and I got no codes... Any help or ideas on what it can be? Thanks in advance.

That happens to me wen go full throttle but if I don’t steep on it it won’t do it

Need help. My 77 Buick won't start unless I'm under the hook with the gas wide open but then it spits and has a vary long start up

S420 giving me thee similar problem

I got a 95 Sonoma we did a v8 swap on from a 92 Silverado 5.7 with a Tbi. Having a issue where it runs great until I go open throttle and it starts sputtering and backfiring any idea what it could be?

Fuck yeah. Good explanation. What if it Boggs at around 30 mph? Is it the same fix?

They must have changed that screw from Allen key to torx???

If this is happening on a new EFI car, is it the throttle body likely sticking open?

Bruhhhh. I'm an idiot....the spring isn't attached to the damn metal rod underneath 🤦🏻‍♂️

Got the same problem but not the same carb its only 1 flap

Is this on all carburetors 🤔

My 85 gmc doing same thing

Could open manifolds also cause this?

Hello what to do if it's stuck open?

The best way to fix that piece of junk is to throw it in the trash. That is by far the very worst excuse for a 4brl carburetor that I have had the displeasure of dealing with. And yours looks new like a replacement. And there you go!

Lolz that sound like my 79 dodge

Fucking life saver than you !!!!

the secondary air doors open too fast and cause the engine to lean out. you can change the secondary fuel rods to get a fatter mixture and that gets the bog out. when the secondary air doors open fast, they lift the fuel metering rods with it. it leans out from too much air and not enough fuel. you can still achieve the right balance of air fuel mixture at wide open throttle

lol now my c10 wont run AS shitty

blaaaaaaaah

Bahhhhgahhhh 🤣

revv up ur enginessssssssss

First problem is it is a 77 Crapvette, next problem is the quadrajunk. If you're a Chevy guy, sell it and get a 1st gen Camaro. Similar price, twice the car