Question about 2003 Pontiac Sunfire

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1998 Sunfire rough running (missfire) common causes?

I am attempting a general tune-up on a 1998 Pontiac Sunfire that has a minor missfire that causes rough idle. I have installed new plugs and wires. Still missing. Any further suggestions?

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  • Anonymous Mar 16, 2014

    at an idle it has missfire

  • Anonymous Mar 31, 2014

    Did head gasket now it idles rough. Everything is in the right order...



2 Answers

Check the coils my 98 had a crack coil that drove me nuts. If thats the problem make sure you replace both ignition coils

Posted on Jun 18, 2008

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If check engine light comes on may be crank position sensor or ur injectors r clogged try some chevron injector cleanor it helps when injectors clogged makes it run smoother

Posted on Jun 16, 2008


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Mar 19, 2011 | 1998 Pontiac Sunfire

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I fixed my transmission and its still missfiring, what can it be

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Mar 01, 2011 | 1998 Honda Accord

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How much would it cost to fix a crack in the transmission pan for a 1998 pontiac sunfire sedan (rough estimate), does this also mean the transmission is going?

It would probably be best to get one from a salvage yard instead, because enough force to cause a crack, is also enough force to warp it. But assuming you have no choice, most shops would probably charge about an hour, at a $75 per hour shop rate, plus the 6 quarts or so of AFT they need to replace, and $10 for a new gasket. They would probably braze it instead of welding, since it is not strength related.

Aug 27, 2010 | 1998 Pontiac Sunfire

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My car won't start and the battery is fine. i have a 98 pontiac sunfire 2.4L, please help

Not enough info to work with. Several problems can cause a vehicle not to start. If your battery is fine that is good, but does the car crank? (engine turning over attempting to start.) I will not speculate on what may be wrong without knowing more details...

Sep 09, 2009 | 1998 Pontiac Sunfire

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Jul 08, 2008 | 1998 Pontiac Sunfire

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