MY 1997 SUNFIRE IS STALLING RUNNING ROUGH AS IF ...

1997 Pontiac Sunfire

Tiny

lynnkathleen

March, 21, 2013 AT 8:33 PM

My 1997 sunfire is stalling, running rough as if timing is off, grayish smoke coming out of exhaust, will not accelerate, transmission is winding out really far before changing gears, black smoke, felt like I had a flat tire. Just put a new starter in it last week, new catalytic converter, has 240,000 miles. Was running great 3 days ago. Serviced regularly. Please help we can't pay for an answer. We have hack mechanics trying to help us. My boyfriend is great with cars and started restoring a 66 Nova until he went blind 15 years ago. It is still sitting. I am unemployed and really desperate for some feedback. Thank you!

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13 Answers

Tiny

Wrenchtech

March, 21, 2013 AT 8:43 PM

You need to start out by having the computer codes read and post the code numbers here.

Tiny

lynnkathleen

March, 21, 2013 AT 8:52 PM

Thank you. We have to find someone to read the codes. And then it will be possible to give a diagnosis of some kind?

Tiny

Jacobandnickolas

March, 22, 2013 AT 1:10 AM

Most nationally recognized parts stores will scan the computer for free. If there is an Auto Zone, Advance auto. Near, contact them.

Tiny

lynnkathleen

March, 25, 2013 AT 10:37 PM

We went to Advance and the only code was PO300. Which the guy said was meant the car was just misfiring, that's all. Thanks for your help. I wish we could narrow it down.

Tiny

Wrenchtech

March, 25, 2013 AT 10:41 PM

Yes, that does leave a lot of unknown things. Random misfire can be caused by any number of things.
What engine does this have?

Tiny

lynnkathleen

March, 25, 2013 AT 10:51 PM

4 cyl 2.4 quad 4. Thanks : )

Tiny

Wrenchtech

March, 25, 2013 AT 10:58 PM

OK, that's what I suspected/ This engine has a very common problem. The whit coil housing cracks internally causing misfiring. Make sure the plugs are in good shape and have no cracks in the porcelain, then I would replace the coil housing. It cost about $40.

Tiny

Wrenchtech

March, 25, 2013 AT 11:05 PM

It's #7 in the picture

http://i602.photobucket.com/albums/tt106/Desi501/Quad4ignition-1.gif

Tiny

lynnkathleen

March, 25, 2013 AT 11:17 PM

Thank you. Is that also the reason for the other problems because a friend of ours said it was the coil also and I don't trust that guy. Lol, but thank you!

Tiny

lynnkathleen

March, 25, 2013 AT 11:20 PM

Also, how difficult is this to install? My boyfriend is blind but with an extra set of eyes he has built and dropped a few engines in his Nova, installed the starter, and other things. Thanks again

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