Fuel system problem

[Les Liller]

I have a 2004 grand prix gt, within the last couple of days, it seems to loose power on acceleration and the motor completely dies at times. After waiting 10 seconds or so it will crank but may die again or just feel like it is loping. The problem is getting worse quickly. I have replaced the fuel filter. This did not stop the problem. I thinking it may be the fuel pump. If it is the fuel pump is there any way to verify this to be sure it is the problem before replacing it?

[gmtech1]

Originally Posted by Les Liller

I have a 2004 grand prix gt, within the last couple of days, it seems to loose power on acceleration and the motor completely dies at times. After waiting 10 seconds or so it will crank but may die again or just feel like it is loping. The problem is getting worse quickly. I have replaced the fuel filter. This did not stop the problem. I thinking it may be the fuel pump. If it is the fuel pump is there any way to verify this to be sure it is the problem before replacing it?

Is the check engine light on?

To check the fuel pump, connect a fuel pressure gauge to the test port on the fuel rail. Key on engine off, fuel pressure should spike up to 55-60psi.

[Les Liller]

The check engine light was on, but has not come back on since I replaced the fuel filter. I will check the fuel pressure. Thanks

[rickisrad]

I would pull the code. It may point you in the right direction. Luckily there is an access cover for the fuel pump on the 04 if that is the culprit.