NHTSA — Fuel System, Other Problems


definitely annoying
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
26,050 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

1998 Pontiac Sunfire fuel system problems

fuel system problem

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1998 Pontiac Sunfire Owner Comments

problem #3

Oct 232000


  • Automatic transmission
  • miles


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. Took car back in for diagnostic which read faulty gas cap, tps sensor, egr, coil packs, gas tank sensor.....had dealer work on it.... they could not see why all this stuff was popping up....had it all replaced. Replacing it did not work. Check engine light came on again about 2 days later!!! I checked car over & found if you wiggled the main wiring harness connections the car ran fine & engine light went out! took to dealer to have wiring fixed. They took all the wiring apart & cleaned everything. They found no problem in the wiring. Check engine light came on next day.took to dealer again finally they said I needed a new battery..... weather was nice again & had no problems with car.... now that winter is here again the check engine light is on again, diagnostic stated tps sensor was bad... I again replaced it & check engine light went out for a couple hours & is back on again & car stalls when stopping & trying to go....car is at dealer right now again. The whole time the check engine light is on I also have problems with the car stalling.................... have had numerous problems from 2000 to now & still having problems.

- Deerfield, OH, USA

problem #2

Dec 292003

Sunfire 4-cyl

  • Automatic transmission
  • 78,150 miles
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). Also, there was a fair amount of corrosion on and in the fitting. In the end, the filter could not be replaced without correcting the 'snap' fitting. To my surprise the fuel line could not be replaced as a separate piece, you have to purchase the entire fuel delivery module. This cost (with the technician time) was $ 425 vs. $50 for a filter replacement. It would seem to me that since the filter is a critical part of the system (a clogged filter could result in vehicle stalls and/or no starts, emission issues etc.) that it should have some sort of reasonable way to replace it without paying for an entire module that was not needed. The filter is a recommended service item.

- Livonia, MI, USA

problem #1

Aug 201998

(reported on)


  • Automatic transmission
  • miles
After air conditioner is cut off the speedometer gets fogged up.

- Lodi, NJ, USA

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