Toyota Matrix Engine Questions

69 messages, Last post on Oct 04, 2009 at 10:08 AM

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What is this discussion about? Toyota Matrix, Engine, Wagon

#68 of 69 Rough Idle by toyota313 Oct 04, 2009 (10:08 am)

#69 of 69 Rough Idle by toyota313 Oct 04, 2009 (10:08 am)
2003 Toyota Matrix idles rough after engine warms up. Diagnostics code shows it misfiring on all 4 cylinders. It started after I washed engine compartment. Could this be a coil problem or arcing of the spark plug boot? I have taken it to the dealer and they stated it was a fuel problem and run a few tanks of good fuel through it. This did not help. Any suggestions? Thank you