• The site migration is complete! Hopefully everything transferred properly from the multiple decades old software we were using before. If you notice any issues please let me know, thanks! Also, I'm still working on things like chatbox, etc so hopefully those will be working in the next week or two.

02 Grand Prix drops power

C

Chuppster

New member
I recently purchased a 2002 Grand Prix GT with 157,000 miles on it. When you accelerate, it has plenty of power, but at times it randomly loses all power, as if I had let off the throttle entirely. Sometimes it will stay in this state for a second, sometimes two, then power returns. There doesn't seem to be a pattern for when it occurs. It happens frequently, perhaps one out of every two times I accelerate. What is the first thing I should check?
 


Start off by checking the fuel pressure at idle, and then verify that pressure is maintained under heavy load. If fuel pressure drops under load than an extreme lean condition will exist and power will drop, sometimes caused by a dirty fuel filter.
 
If you have ~$160 go to Autozone and try to rent the fuel pressure kit. I did today for my car. When you take it back you should get the full amount back as well.

Sent from my SM-N900P using Tapatalk
 


Quicksilver, if fuel pressure is not maintained when under load, like lets say when the car is revved up real fast the pressure drops from, I'd say 43psi ish to about 34psi ish, (my 99 GTP), would you say the filter is plugging up? Or pump is bad?

Sent from my SM-N900P using Tapatalk
 
You must log in or register to reply here.
Back
Top