3.8 litre Stalls at stops
Asked by Chad_Finney May 11, 2017 at 08:37 AM about the 1999 Pontiac Grand Prix 2 Dr GT Coupe
Question type: Maintenance & Repair
When I pull up to a stop light or sign the car dies. Car will restart after about a
minute but only if I hold the throttle to the floor. What could this be?
6 Answers
sixfootsix_car_guy answered 6 years ago
Most likely a fuel filter, or fuel pump issue. This is a known issue with the GM 3.8L V6. Best of luck!
Chad_Finney answered 6 years ago
And the vehicle would still run fine and have normal power at rolling speeds?
sixfootsix_car_guy answered 6 years ago
Yes. I fixed a 2000 Grand Prix the other day that had the same issue. I used a rubber mallet to bang (lightly) on the fuel tank. This freed some of the residue that collects at the bottom, and her car ran fine until she could afford the fuel filter (which I swapped yesterday). The car runs perfectly now.
Doesn't sound like a fuel issue at all. A failed fuel pump doesn't just start working again all by itself. Have the car scanned for trouble codes. The computer probably knows what's wrong. You just have to ask it.
1998 pontiac 3.8lt starts and idles fine until I put it in gear then dies
