Hello,

I have a 2000 Pontiac Grand Prix 3.8L Supercharged (GTP) that just stopped on the highway. No signs at all, it just died. Now it doesn't want to stay on when I turn it over. The car goes on and then just shuts off, it doesn't stay idling. If I floor the gas it stays on but if I try to hold it at about 2000 RPMS it also dies. I have replaced the fuel filter, fuel pump, regapped the spark plugs and there are no DTC codes. I also checked for spark at the coils and they have spark. During the process my battery died one morning and I have replaced that also. I have checked all of my vacuum lines and they all seem to be fine. I have also removed my TPS, MAF, IAC and IAT to spray them down. Now since I don't have any codes, what should I do next? I am really at a lost here, please help me out.

Thanks

Based on your symptoms unless you did it earlier try bypassing the fuel pump resistor. See link below.

Click here (http://www.automotiveforums.com/vbulletin/showthread.php?t=658282)

Another possibility is a bad MAF sensor. So disconnect it (ignition to off first) and then see how driveability is.

And welcome to AF.

Thanks BNaylor, I immediately tried editing (bending) the relay and turned the car on and it stood running, so off to order a new FUEL PUMP RESISTOR...

Well at least now I have a new fuel filter, fuel pump and fuel pressure tester.

Thanks again BNaylor

Bob, just wondering if you know any good sources for a fuel pump resistor?

Bob, just wondering if you know any good sources for a fuel pump resistor?

Tim, the most commonly used source is PFYC.com (see link) or the GM Dealer. Also, there used to be a kit that moved it to within the engine compartment but I don't know if that is available anymore.

Click here (http://www.pfyc.com/pc/WB3006/GPUNDER/Fuel+Pump+Resistor+-+97-03+Grand+Prix.html)

Hmmm, thanks! I was just wondering as its probably among the next to be replaced on my GTP.... I've had all the other GP notorious problems, why stop now?

Great Thank You Guy For All Your Help Finally Fix My Car.

Great Thank You Guy For All Your Help Finally Fix My Car.

so was it the maf sensor or fuel resistor?