Quadrajet stumble
#1
Junior Member
SHOW GUEST
Thread Starter
Join Date: Oct 2003
Posts: 5
Quadrajet stumble
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?
#2
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' !!!
#3
Junior Member
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Thread Starter
Join Date: Oct 2003
Posts: 5
overlooked something
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
#4
Senior Member
RACING JUNKIE
Join Date: May 2006
Posts: 2,044
Re: overlooked something
Originally Posted by 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
#7
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
''JUST MY TWO CENT'S WORTH''
http://www.racingjunk.com/profile/163312