Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
are there any codes set in the computer ?
when it does this is the transmission in 1st gear ?
is there a chance the issue is not the transmission and more so a low power or bogging down of the engine power ?
i am wondering if our issue is an engine power issue v/s a transmission issue
a TPS would set a code
is the fuel filter newer on this ?
if you remove the front O2 sensor out before the cat and take it for a quick ride will the power come back ?
it will be a little loud with the O2 sensor out but this is just for testing for a restricted cat converter
see if the power comes back with the O2 sensor out in front of the cat
i am leaning more so to the issue just being the engine having low or power
can you connect a fuel pressure gauge and see what the fuel pressure is reading key ON engine OFF ?
see what the pressure is also remove and clean the MAF and see if the power comes back after you clean it
since the exaust id not restricted we need to be sure fuel pressure is good and the MAF is clean
MAF spray cleaner or carb cleaner
Hello, was just wanting to see if you still needed help with this.
yes, sometimes the maf will not set the check engine light. Let me know how that goes and we can work further if needed
Thanks, ***** ***** you have the recurring problem with it not running well under wide open throtlle. Do you have a multi meter handy so we could check throtle position sensor?
Sounds good, let me know how things go.
I apologize for the delay. No need to remove it.You need to unplug it. You want to set your meter to ohms and place one lead on the connector the gray wire plugged in to it and the other where the dark blue wire pluged in.
You then need to move the throtle lever and watch the change on the meter. It should never read infinity or open circuit and should be smooth to full throttle.
let me know what you find and we can work further
Glad to hear it's running better. The passing gear hesitation (wide open throttle) may be a fuel pressure/flow issue. I think the previous expert mentioned it and I would use a fuel pressure gauge while driving to see how that looks. The only spec GM give is 60-66 with key on and engine off. If you're driving and see a big dip below what you have key on engine off I would start by replacing the fuel filter if you haven't already.
This van has the CPI injector system (spider) which used one injector and poppet valves. They can get problometic and the poppets can leak/stick causing issues.
I'd drive it for a bit and see how it does with the fuel pressure gauge installed and go from there.
Sounds good, I'll be around.
No rush, I'll be ready when you are.