Bcru

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

BNaylor

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

Click here

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

And welcome to AF.

__________________

'08 Pontiac Grand Prix GXP (Dark Slate Metallic) - LS4 5.3L V8
'08 Pontiac Grand Prix GXP (Liquid Silver Metallic) - LS4 5.3L V8
'02 Oldsmobile Alero GL2 - LA1 3400 V6
'99 Buick Regal LS - L36 Series II 3800 V6
'03 Honda CR250R MX - 2 Stroke 250cc
'97 Pontiac Grand Prix GTP - L67 Series II 3800 V6 Supercharged
Timeslip 08/12/06

AF Community Guidelines

Bcru

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

tblake

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

__________________
2000 Pontiac Grand Prix GTP
(3.4" Pulley, DHP 1.5 Powertuned PCM, ZZP 2.5" High Flow Downpipe, MMS Ported and Polished Lower Intake Manifold, ZZP Stage 1 Ported Throttle Body, 180° Thermostat, NGK Iridium TR6IX)

1997 Chevrolet Silverado K1500 4x4 350
(soon to come,true dual exhaust, roll-up access tonneau cover, light bar)



Check this out! (Good Stuff)
Honda Cog Commercial

BNaylor

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

__________________

'08 Pontiac Grand Prix GXP (Dark Slate Metallic) - LS4 5.3L V8
'08 Pontiac Grand Prix GXP (Liquid Silver Metallic) - LS4 5.3L V8
'02 Oldsmobile Alero GL2 - LA1 3400 V6
'99 Buick Regal LS - L36 Series II 3800 V6
'03 Honda CR250R MX - 2 Stroke 250cc
'97 Pontiac Grand Prix GTP - L67 Series II 3800 V6 Supercharged
Timeslip 08/12/06

AF Community Guidelines

tblake

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?

__________________
2000 Pontiac Grand Prix GTP
(3.4" Pulley, DHP 1.5 Powertuned PCM, ZZP 2.5" High Flow Downpipe, MMS Ported and Polished Lower Intake Manifold, ZZP Stage 1 Ported Throttle Body, 180° Thermostat, NGK Iridium TR6IX)

1997 Chevrolet Silverado K1500 4x4 350
(soon to come,true dual exhaust, roll-up access tonneau cover, light bar)



Check this out! (Good Stuff)
Honda Cog Commercial

ayala22

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

bridget36907

so was it the maf sensor or fuel resistor?

__________________
2005 Grand Prix GT
3800

1995 Chevy Caprice
LT1 5.7


1986 Dodge Ram