Pontiac Sunfire 98gt

Tiny
LUNARLANDER
  • MEMBER
  • 1998 PONTIAC SUNFIRE
I have a 98 sunfire gt, 2.4l, 150 000kms this is is the worst car I ever ownd.3 weeks ago the car started to idle a little funnie almost sounds like it wants to start stalling. Recentley ive done fuel filter, oil, fuel injjection + throtle body cleaning and the car is still acting up. It is also backfireing a little more than usual as it has been since I put new catalitic converter on it last summer. The engine check light came on yesterday briefly then went back out.I took it to the mechanic but luck would have it the car ran fine and they couldnt find a prob just old missfire code on diagnostic check jwhich may have been from when I did a new waterpump last summer and had to dissasemble+reassemble timming chain cover 10000 times to get funnie tensijoner to work properly then when I left it acted up again. It is only really noticeable in idle otherwise the engine sounds good. When it idles the engine shakes a little and sounds as if bogging out a little any ideas? Dont want to go to mechanic again if possible to check anything else on my own
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Wednesday, June 27th, 2007 AT 8:33 AM

4 Replies

Tiny
JIMVANDERBECK
  • MEMBER
This sounds like the same prob I have. Mine has a 2.2 5speed. Mine died on me and would not even run found out I have water in the fuel injection rail. Cleaned it out runs better but still dies out and backfires on me. Did you try checking your egr valve? Mine is working but I still have prob driving it. If you find anything that helps let me know hopefully this helps you
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Thursday, July 5th, 2007 AT 9:53 AM
Tiny
LUNARLANDER
  • MEMBER
Egr valve seems to fine I unplugged it and drove then idle was doing the same thing.I am waiting on code reader maybe it will help I duno. Its backfiring like crazy and seems to run a little rich to although it may have something to do with the stuff the garage put into the tank during the injection cleaning. Gm should start making $$ bags I am really srating to dislike my penny pincher. Maybe cmp sensor? I duno
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Thursday, July 5th, 2007 AT 8:49 PM
Tiny
HPKING
  • MEMBER
Does it feel under powered compared to befor. Your catalitic converter can be plugged up.
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Sunday, September 25th, 2011 AT 10:22 PM
Tiny
FIXITMR
  • EXPERT
Did you get it resolved? What about vac leaks or IAC valve? Check for misfire codes again? Maybe defective coil?
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Sunday, October 30th, 2011 AT 1:15 AM

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