1998 Pontiac Sunfire Fuel system Problems

“1998 Pontiac Sunfire gt anti-theft system won't disengage, car is dead. (when the anti-theft system is triggered, the fuel pump is shut off) it may have been triggered by using a copy of the original key. Following manufacturer's instructions (turn on iignition for 10 min, turn off and turn on again) doesn't work. An internet search revealed that there are 1000s of people with the same problem with Sunfire and other GM cars. I would like GM to acknowledge the problem and repair the faulty system.”

“Within the last 10,000 miles fuel pump was replaced four times. Every 2500 to 3000 miles the pump will malfunction. Contacted the dealer. However, problem recurred.”

“This concerns the fuel system on '98 (and similar year) Pontiac sunfires. On december 29, 2003 this vehicle was taken in for replacement of the in-line fuel filter. The vehicle had been losing acceleration and has 78,000 miles on it. It was taken to a Pontiac dealer for the service. The filter is connected to the fuel line with a 'snap' fitting. Upon trying to service the filter, either the dealer broke the snap fitting or the previous owner had damaged it (vehicle was purchased with 45,000 miles on it, and there were no leaks so I suspect that it wasn't damaged). …”

“When I bought the car used in october of 2000 it had to keep going back to the dealer for about 3 months because the engine in the car kept cutting out while driving around 55-60 MPH. Dealer could not duplicate the problem. Finally after the 3rd month they found the main computer was bad. That was replaced. It ran fine until the next winter. The check engine light came on & car kept stalling when at stop signs/lights. Took to dealer had diagnostic ran which read faulty gas cap, tps sensor.... I replaced them myself. Check engine light went out till the next day. …”

“I've been having multiple problems with my 1998 Pontiac Sunfire gt. Last month I had a fuel injector and water hose go bad and need replaced. The suction hose pump for the AC was leaking and had to be replaced within the past 3 weeks. In the same time period, the compressor started leaking. I've had 2 different compressors put in, and both have leaked still. The 3rd compressor is being installed today, so we'll see whether it leaks too. A compressor should really last longer than 5 years, and I shouldn't have 3 compressors in a week trying to find one that doesn't leak. …”