99 Grand Prix GTP starts and stalls
Asked by ercross May 29, 2011 at 05:42 PM about the 1999 Pontiac Grand Prix
Question type: Maintenance & Repair
It's a 3.8, approx 110K miles. Check engine light came on this week. Now car starts and stalls, won't stay running, even with gas. Indicated it was mass air flow sensor. Changed MAF and idle air control valve. After switching IAC, started better, but still stalled. Would appreciate any suggestions. No other car problems since I've owned it (4 years). Thanks
4 Answers
For anyone else having this problem, I just want you to know it was the fuel pump resistor. It can easily be bypassed. Beware though, it's very hard on your fuel pump, so do not continue to drive your car on bypass. However, it will get you back to driving so that you can grab parts, go to work, etc. Just relocate and replace resistor asap. Relocation kit is ~$50.
88951182 RESISTOR KIT. Fuel Pump RESISTOR KIT,F/PMP (ALSO USE T/W 12345382 COMPOUND). Required: 01 For: W 3.8-1(L67) (1997-2000) (1997 - 1997).
Hotrod46703 answered 6 years ago
Check your throttle position sensor that has a lot to do for what i had done with mine of corse i have az scanner that will tell me what i need ti no
Thanks. It was the fuel pump resistor. Total pain to replace (above front right tire under battery pan if I remember correctly). Car will run as long as it's on bypass by bending one of the pins on appropriate relay, but will be running hella rich and wasting tons of fuel. For such a cheap fix, not one of 11 repair shops/dealerships I went to even knew what it was and all started with a $200 initial fee to drop the tank. Funny since resistor is not located anywhere near fuel pump!
