2003 Chevrolet Venture Repair Question
Asked on March 17, 2012
Car stumbles/stutters/hesitates upon acceleration from dead stop or increasing speed sometimes
New fuel filter,newplugs/wires/o2 sensor,dry gas,injector cleaner,no codes,certified mechanic found no misfires in computor history, 52psi gas pressure gauge reading engine off key on,55psi at idle,58/59psi on accelaration to say 50mph, even stumbles/hesitates at 58/59psi..could it be coils? fuel pressure regulator holds vacuum ok, sometimes it runs fine. van has electronic egr. depressing on accelerator when stumbling causes engine to perk up and car gets going.with brakes locked and gas pedal floored rpm changes by around 500rpm about.
Answer
Replied on March 17, 2012
very doubtful coils at fault since no misfires.
Answered by
fixitmr
24 questions askedReplied on March 17, 2012
does it feel sound like misfiring or just loss of power?
Answered by
fixitmr
24 questions askedReplied on March 17, 2012
needless to say, live data monitoring would help zero in on issue.
Answered by
fixitmr
24 questions asked
Replied on March 17, 2012
does not sound like misfire...is loss of power...surges up and down i would say about 4-500rpm approx it has no tach.we used to say it was "breaking up" when u get on the gas.
Response from
ronbo1
1 question askedReplied on March 18, 2012
live data monitoring would be advantageous. wonder if auto chain stores can do that?
Answered by
fixitmr
24 questions askedReplied on March 19, 2012
i am giving up on it and dropped it off at the chevy dealer this evening.....hopefully i wont have to take out a second mortgage to pay them if they can find out the problem...thanks for ur help.
Response from
ronbo1
1 question asked
Replied on March 19, 2012
let us know how it goes.
Answered by
fixitmr
24 questions askedReplied on March 21, 2012
dealer says it s catalytic converter plugged wants 1300.00 bucks lolo takin to a mom and pops to see what he says..
Response from
ronbo1
1 question askedReplied on April 4, 2012
If it isnt a cat maybe look at a pressure control solenoid. Causing a shudder under load when hot. Pretty common problem with the transmission in your van.