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post #1 of 4 (permalink) Old 04-07-05, 07:09 PM Thread Starter
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confused Car misfires on Hot days???

My car starts running rough only on hot days, 80ºF or higher, after I it has reached operating temperature. This usually occurs about 20 miles into my drive. I have had the P0306 code, cylinder #6 misfire.

Replaced the plugs and check the wires for cracks. I have also used injector cleaner a few times.

This actually started last fall and went away with the cooler weather until now. It has been suggested that I might need my head gasket replaced$$. I am planning to have a mechanic look at it but wonder if anyone has any possible solutions.

Thanks

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post #2 of 4 (permalink) Old 04-08-05, 06:30 AM Thread Starter
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Arrow Re: Car misfires on Hot days???

Quote:
Originally Posted by Kenforce
My car starts running rough only on hot days, 80ºF or higher, after I it has reached operating temperature. This usually occurs about 20 miles into my drive. I have had the P0306 code, cylinder #6 misfire.

Replaced the plugs and check the wires for cracks. I have also used injector cleaner a few times.

This actually started last fall and went away with the cooler weather until now. It has been suggested that I might need my head gasket replaced$$. I am planning to have a mechanic look at it but wonder if anyone has any possible solutions.

Thanks
I forgot to add this, my car is a 1997 Ford Taurus with a 3.0 Vulcan engine.
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post #3 of 4 (permalink) Old 04-08-05, 12:03 PM
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Re: Car misfires on Hot days???

Could be as simple as carbon build up on the EGR or even arcing between the wire and the engine. It could be as bad as a flat cam lobe.

You stated that you replaced the plugs and only checked the wires. I would replace the wires to make sure it is not that, since that is a fairly cheap replacement. Also take a look at your EGR valve to see if there is carbon build up. If there is clean it (duhh i know stupid to say, but some people will come back in and ask what to do next so it is better to assume you dont know).

Have you checked the coils themselves? It could even be a bad coil. There are manythings that can cause this, but these are the basics.
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post #4 of 4 (permalink) Old 04-08-05, 12:44 PM Thread Starter
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Re: Car misfires on Hot days???

Ok I'll try your suggestions.

Thanks
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