1999 Plymouth Voyager Service Engine Light On Computer Misfire On 6 Had Tuned

1999 PLYMOUTH VOYAGER
148,000 MILES
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Service Engine Light on. Computer says misfire on #6. Had it tuned up, replaced spark plugs. Light came on again. Changed spark plug (again) on #6. Today, while sitting at stop light noticed a rough idle. Light came on again. Any ideas?
Jan 18, 2013 at 2:48 PM
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ASEMASTER6371
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could be low compression, bad plug, wire, coil injector or wiring. all these need to be checked.

roy
Jan 18, 2013 at 3:23 PM
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CARADIODOC
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Swap injector # 6 with one from a different cylinder to see if the misfire switches to that other cylinder. If it does not, that just leaves a valve / compression problem. Depending on which engine you have, it could also be an ignition coil problem.
Jan 18, 2013 at 3:27 PM
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