98 Grand Prix GTP fuel delivery issues?

**traumakings** · 05-27-2014

Hey guys, I joined up hoping to get some help and information.

I was driving the car fine all day yesterday, ran great. I go to leave for a dinner, drive 2 miles and the car stalls going down a hill, would crank it and it would start for about 5 seconds then conk out.

2.5 hours later I had it towed.

I figured it was a fuel delivery issue, so I started from the cheapest fix, which was the fuel filter. The filter was clogged, and i blew alot of black stuff out of it. I replaced it.

The car starts, and will idle for awhile, but it almost sounds like its missing, the air filter also makes a louder than usual sucking noise, if leave it idle too long, it'll bog down and die, if i attempt to drive it, it has no acceleration, it'll eventually die down after a few minutes.

When revving the car when i start it, its fine. But then it will bog down and die, no matter if im on the gas or not.

Fuel pump? Something else? Im a litte lost and help is GREATLY appreciated.

**machinegunsquid** · 05-27-2014

Any SES lights? Sounds somewhat like your CKPS is going out/bad (Crank Position Sensor)

Any autoparts store or anyone with a scanner/tuner can check your OBDII codes and see if it has or is currently throwing a code.

If that doesn't show anything, I'd check all your grounds to make sure they are good, then check your fuel pressure at the fuel rail.

**traumakings** · 05-27-2014

No lights on. Tomorrow im going to take off the quick connect fuel line and start the car and see how much fuel it's spitting out. Would a video help anyone?

**Fivefingerdeathpunch** · 05-27-2014

Try unplugging the MAF and starting it, see if you can drive it without it wanting to kill but just don't mash it.

I wouldnt say it's a crank sensor as that would really do what he is describing.

**traumakings** · 05-28-2014

Originally Posted by Fivefingerdeathpunch

Try unplugging the MAF and starting it, see if you can drive it without it wanting to kill but just don't mash it.

I wouldnt say it's a crank sensor as that would really do what he is describing.

Think it could be a MAF issue? I just replaced that about, hmm, maybe 2 months ago.

It just seems like the fuel pump is dying, but not completely. It'll pump fuel in initially, then cuts out. Im going to check today, ill update with a video too. Thanks for the suggestions.