Quadrajet stumble

[footbrake]

First time out last night since last year. Car has a huge stumble coming out. 3 time runs,3 stumbles. Nothing was changed on the carb and the secondary air valve is set as it was last year. Even driving on the thruway at 60 and mashing it, it stumbles. Driving it on the street there's no problem It doesn't stumble under normal acceleration, but only at W.O.T.. Could this still be the accelerator pump after sitting all winter?

[TheYellaBrick]

If you're running pump gas, the life span is only about 5-6 months. If you had not treated your gas and then run the engine long enough to get that treated gas up into the carb, you could have varnish built up in the carb ports. Another issue could be an accel pump rubber breakdown with the added ethenal required now days. Either way I'd be doing a super clean and rekit with updated rubber parts. HAVE FUN RACIN' !!!

[footbrake]

Wasn't the acc. pump after all. The little "S" curve piece of rubber tube that goes from the vacuum port on the carb to the pull off was disconected for some reason. The way it was resting made it look like it was connected. Thanks for the help anyway

[cepx111]

Wasn't the acc. pump after all. The little "S" curve piece of rubber tube that goes from the vacuum port on the carb to the pull off was disconected for some reason. The way it was resting made it look like it was connected. Thanks for the help anyway
I hate when that happens!

[us7race]

What has changed other than the carb?
The quadrajet operates off of Vacuum...

[justin45]

i figured out ur problem.... its a quadrajet get a damn holley and u wont be seeing no carb problems in the future :!: :!: :!: :!: :!: haha

[mopar1968]

Aquick lesson ''justin'' he just might be racing in super stock racing where he must run a q-jet, again listen and learn before opening thy mouth :!: :!:

''JUST MY TWO CENT'S WORTH''

http://www.racingjunk.com/profile/163312

[justin45]

well i figure if he doesnt know bout quadrajets he prolly aint racing in super stock class. so hes prolly just a strret strip racer... so keep ur mouth shut u old worn out mopar man

[dparker]

Now thats some funny Sh*t......Old Worn Out Mopar Man.
Kinda has a certain jingle. :lol: :oops: :lol:

[MEMRACING62]

OLD WORN OUT MOPAR MAN :!: :lol: :lol: SOUNDS LIKE A GREAT NAME TO PUT ON THE DOOR OF THE CAR :P :P

[Scooterz]

man... there is a lot of smack talk goin' on these days... must be time to go racin.

[MEMRACING62]

YUP , TIME FOR RACE THERAPY :lol:

[mopar1968]

This old worn out mopar man, will take on your little loud mouth, don't have a clue,shittin yellow,no car,bow legged,ass anyday, the best part of you ran down your daddy's leg, you don't have a clue what your talking about, so you need to get your homework done,get your bath, and go to bed you have school tomorrow,and leave the car talking to the men, oh by the way get your mom to clean behind your ear's :!: :!: :lol: :lol:

''JUST MY TWO CENT'S WORTH''

http://www.racingjunk.com/profile/163312

[justin45]

awe look mopar man is got his panties in a wad ahahahahaha :lol: :lol:
u can take me on anyday and woo no car im bought to start building on it so great come back. and the best part of me was inside ur wife lastnight hahahahahaha :lol: :!:

[mopar1968]

Now let me let you in on something and most will agree, My wife is not involved in this, so let's keep her out of it, you understand me? I don't give a fuck who you are you don't go over that line with me! You are nothing but a damn snot nose kid that can't take a joke when you see one! I explained the whole thing to your buddy, I will gladly take a trip to whip your ass over my wife, she has done nothing to you!

[justin45]

you started this shit and that shit aint jokin ur calling me a waste of sperm so idc who i bring into this and if u think ur that big and bad come try :!: :!: u shouldnt be talkin shit in the first place cuz im gonna win :!:

[mopar1968]

But i sure didn't include anyone's family in it! You don't talk about someones wife, Now i pray to god that we do meet one day, I promise to god above you will regret involving my wife in this!

[justin45]

no family huh u said somthing bout my dad! and dude if u think ur that bad i hope we do meet someday. im 6'7 and 200lbs so i aint hard to miss :!:

[mopar1968]

O h i promise i won't miss!

[FullTimeRacing]

yall need to start yall own post justin45 vs. mopar1968 :lol: :lol: :lol: :lol: :roll: :roll: :roll: :roll: :roll:

[justin45]

mmk cuz io enjoy whippin shit talkers ass :!: everybodys on here trying to get info and any help and all u do is talk shit :!: get over urself and if u realy help people like u say start doing it :!: and btw ur jokes suck and jus piss people off u take it way to far :!: :!: :!:

[justin45]

ahaha i like that idea :lol: :lol: :lol:

[Tod74]

no family huh u said somthing bout my dad! and dude if u think ur that bad i hope we do meet someday. im 6'7 and 200lbs so i aint hard to miss :!:

FYI
6'7 at only 200 pounds = toothpick. :lol:


He was just messing with you guys....you obviously cannot tell when someone is just yanking your chain to get a reaction. I know this for a fact because he told me via PM. he was only playing around...and that he was about done and was going to let you guys know .Anyone that's been here awhile will tell you he isn't the trash talker he has been acting like the last week or so...he is a good dude...he was just trying to get you new guys wound up. I haven't read every post and don't know what all he may or may not have said...but talking about his wife in a disrespectful manor isn't necessary.

[suicidebomb]

Mopar told me the same thing....This is gettin a little out of hand...Everybody needs to take two steps back, and relax a little.

[MEMRACING62]

X2, MOPAR TOLD ME THE SAME THING, JUST PULLIN YOUR CHAIN, GOTTA LEAVE WIFE & KIDS OUT OF IT. THATS WAY TO LOW OF A BLOW. WE ALL PULL EACH OTHERS CHAIN AROUND HERE. IF YOUR GONNA PITCH YA GOTTA BE ABLE TO CATCH. EVERYBODY HERE LEARNS ALOT FROM EACH OTHER WHILE AND KEEPING HUMMOR TOO. THE WIFE THING NEEDS AN APOLOGY & LETS MOVE ON. MIKE, (THE OLD WORN OUT CHEVY MAN :lol: )

[THERATTLER]

IF YOU ARE GOING TO START TALKING ABOUT WHAT YOU DID TO SOMEONES WIFE ON HERE YOU CAN GO SOMEWHERE ELSE,,WE SURE AS HELL DON'T NEED YOU , GO TO YELLOWBULLIT THEY WILL LOVE YOU...FUN IS FUN , BUT THAT AIN'T FUNNY ..TAKE YOUR WIFE CRACKS SOMEWHERE ELSE :!: YOU JUST LOST EVERYBODY'S RESPECT ON HERE . :(

[bowhay]

so lemme ge tthis straight
talkin about someones wife is out of the question
but sayin the best part of him ran down his dads leg aint over the line
thats awful one sided dont yall think

[MEMRACING62]

NO , THAT DESERVES APOLOGY TOO. THAT IS OVER THE LINE . TIME TO BACK UP AND STICK TO CAR SMACK TALK. :idea:

[mopar1968]

Yes i do apologize for that remark, and yes it was out of line! :!: :!:

''JUST MY TWO CENT'S WORTH''

[bowhay]

ok well thats good but now that its done with

back to the problem at hand
and rochester q-jets they are vacume secondary, there is a lil rod that connects the vacume pump on the carb to the back barrels, and it is how u control when the barrels open
maybe iti got bent a lil more than it should be
idk just an idea
it happened to mine before i went holley

[Tod74]

. IF YOUR GONNA PITCH YA GOTTA BE ABLE TO CATCH. )

That don't sound too good. :?

[justin45]

yea so see if u wouldnt have made that remark i wouldnt have had to make that other remark.. so if ur gonna be pullin someones chain dont do it so hard.. theres a point in friendly joking and pisssing someone off

[MEMRACING62]

YA TOD, I KNOW, HAD TO DUST THAT ONE OFF, ITS AN OLD ONE BUT KINDA THOUGHT IT FIT THE SITUATION. :roll:

[bjuice]

Ok i like smack talking and fully support it...but lets Rip on each other...ain't no-body's wife's ,fathers,mothers,..or HEMRROIDS got nothing to do with this here Forum.....

lets keep it all on the table..ok Guys !

Thanks

[MEMRACING62]

HEMRROIDS :shock: :shock: YA DONT WANTA RIP ON HEMRROIDS :cry: :cry:

[cepx111]

ok well thats good but now that its done with

back to the problem at hand
and rochester q-jets they are vacume secondary, there is a lil rod that connects the vacume pump on the carb to the back barrels, and it is how u control when the barrels open
maybe iti got bent a lil more than it should be
idk just an idea
it happened to mine before i went holley

Bowhay, actually there is a adjustment on a spring that controls the opening rate of the air valves ( the top set of butterflies) the bottom butterflies are mechanical, just like a holley double pumper, but the top set of butterflies (the air valves) control how much air that goes into the secondaries and how fast, its a bitch to set the spring properly trust me - you just have to play with it.
Too tight and they take to long to open up causing poor performance, too loose and they open to fast causing a bad bog but then takes off, sounds like yours are to loose.

And that pull off is associated with the choke, its needs full manifold vacuum on that hose, it disables the rear air valves till the choke has fully opened, if its not working or has a leak, the air valves may not open at all or open when the engine to cold to handle that volume of air.

Goodluck, Cp

[hilldale]

you talk hemrroids, oh man i was takin a justin the other day on the bowl, and i coughed and tore one of those babys. man o man. i was bleeding bowhays.

[oldandtired]

[/quote] Bowhay, actually there is a adjustment on a spring that controls the opening rate of the air valves ( the top set of butterflies) the bottom butterflies are mechanical, just like a holley double pumper, but the top set of butterflies (the air valves) control how much air that goes into the secondaries and how fast, its a bitch to set the spring properly trust me - you just have to play with it.
Too tight and they take to long to open up causing poor performance, too loose and they open to fast causing a bad bog but then takes off, sounds like yours are to loose.

And that pull off is associated with the choke, its needs full manifold vacuum on that hose, it disables the rear air valves till the choke has fully opened, if its not working or has a leak, the air valves may not open at all or open when the engine to cold to handle that volume of air.

Goodluck, Cp[/quote]


This is 100% correct. Due to the lack of a rear acc pump, you have to rely on the secondary circuits to pull the fuel. When his vacuum line was off, he went to a huge lean position, causing the hesitation.
I have been sucessful in running without the vacuum pod but tightening the spring on the upper butterflys. You had to be above 3500 to go WOT.
Dave

[justin45]

wow hilldale that was really lame....... :?

[Tod74]

wow hilldale that was really lame....... :?

x2 :lol: