SERVICE ENGINE LIGHT ON

  • Tiny
  • Anonymous
  • 1999 PLYMOUTH VOYAGER
  • 148,000 MILES

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?

Friday, January 18th, 2013 AT 10:48 PM

2 Replies

  • Tiny
  • ASEMaster6371
  • EXPERT
  • 25,554 POSTS

Could be low compression, bad plug, wire, coil injector or wiring. All these need to be checked.

Roy

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Friday, January 18th, 2013 AT 11:23 PM
  • Tiny
  • Caradiodoc
  • EXPERT
  • 25,993 POSTS

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.

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Friday, January 18th, 2013 AT 11:27 PM

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