2004 Pontiac Grand Prix Fuel System Problems

TL* THE CONTACT OWNS A 2004 PONTIAC GRAND PRIX. THE CONTACT STATED THAT THE VEHICLE WAS LEAKING ENGINE OIL WHILE DRIVING. THE CONTACT STATED THAT OCCASIONALLY WHEN THE BRAKE PEDAL WAS DEPRESSED, THE VEHICLE FAILED TO STOP AS DESIGNED, CAUSING THE BRAKING DISTANCE TO BE EXTENDED. THE CONTACT STATED THE ABS WARNING LIGHT WAS ILLUMINATED. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC TO BE DIAGNOSED. THE CONTACT WAS INFORMED THAT THE BRAKE HUBS, REAR BRAKES, OXYGEN SENSOR, AND FUEL GAUGE NEEDED TO BE REPLACED. THE VEHICLE WAS NOT YET REPAIRED. THE MANUFACTURER WAS NOT INFORMED OF THE FAILURE. THE FAILURE MILEAGE WAS APPROXIMATELY 229,000.

I'VE READ TWO OTHER COMPLAINTS (10187874 - 10154674) IN REGARDS TO THE NO-START. I'VE HAD CONCERNS WITH THIS FOR OVER A YEAR. RARELY, THE CAR WILL START FINE. MOSTLY, I FOUND THAT I MUST GIVE ACCELERATION AT START-UP FOR A SUCCESSFUL START. OTHERWISE, THE CAR WILL EITHER NOT CATCH OR IT'LL JERK AND STALL OUT. OTHER THAN THIS, THE CAR IS FINE. IT'S ANNOYING, BUT I'VE GROWN USED TO IT SINCE IT'S ON AN EVERY-DAY LEVEL. I LIVE IN TN, SO WE ARE IN RELATIVELY WARM CLIMATE. IT'S NOT AN ISSUE OF WEATHER. I CONTACTED MY LOCAL PONTIAC RETAIL FACILITY AND THEY ADVISED ME THEY HAVE TWO OTHER GP'S WITH THE SAME ISSUE. THEY SAID IT MAY BE THE FUEL PUMP GOING OUT. I HAVEN'T TAKEN IT IN YET. *TR

MY 2004 GRAND PRIX GT HAS HAD AN ACCELERATION HESITATION OR STALL (ENGINE SHUTS DOWN) SINCE PURCHASE (AUGUST /04). TWO DIFFERENT SENSORS HAVE BEEN REPLACED, BUT IT HAS FAILED AGAIN. RECENTLY WHEN LEAVING WORK; ENGINE RELATIVELY COLD, HAD TO ACCELERATE TO ENTER HIGHWAY TRAFFIC AND ENGINE STALLED AND DIED. DEALERSHIPS HAVE BEEN UNABLE TO DUPLICATE SINCE IT IS EXTREMELY INTERMITTENT.

UPON COLD STARTUP VEHICLE WILL STALL, HESITATE OR SURGE UPON THE FIRST PRESS OF THE ACCELERATOR PEDAL. COMPUTER HAS BEEN REPLACED AND REPROGRAMMED ON PRIOR ATTEMPTS ALONG WITH NEW THROTTLE BODIES AND STALLING NO LONGER PRESENT, BUT HESITATION AND SURGING ARE STILL PRESENT. SERVICE ENGINE SOON LAMP HAS STARTED ILLUMINATING. CODE IS P0452 FOR THE FUEL TANK PRESSURE SENSOR. ACCORDING TO A GM ADMINISTRATIVE MESSAGE TO DEALERS ON 4/2/04, "DEALERS ARE ADVISED TO ORDER FUEL TANK PRESSURE SENSOR P/N 16238399 INSTEAD OF P/N 09377680. FUEL TANK PRESSURE SENSOR P/N 09377680 HAS PROVED TO BE UNRELIABLE AND IT IS LIKELY TO FAIL AGAIN SHORTLY AFTER INSTALLATION. PRODUCTION CHANGE TO USE P/N 16238399 IS SCHEDULED FOR MID-APRIL." DEALER WILL BE REPLACING SENSOR ON SUBSEQUENT VISIT. *JB

THE CAR ACCELERATES WITHOUT THE OPERATOR DEPRESSING THE ACCELERATOR PEDAL. HERE WERE TWO NEAR MISS CRASHES WHEN THE CAR WAS BEING DRIVEN IN TOWN AND ACCELERATED BY ITSELF . ONE INCIDENT WAS WHEN MY PREGANANT WIFE NEARLY STRUCK A TRAIN. *AK THE ACTUAL DATE OF THE INCIDENT BELOW IS NOT CORRECT, I DO NOT HAVE THAT INFORMATION WITH ME. I DO KNOW THAT THE FIRST TIME WAS IN JANUARY OF 2004.