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1999 Mercury Villager Question: what can cause a rough idol? had a tune up at 100,000 now 130,000

 

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Visitor, 3.3L V6, Elyria, OH, December 25, 2010, 11:48

It idols rough when it is gear when stopped at red light or waiting in traffic. No check engine lights on

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  • Answer #1

    December 25, 2010, 21:14
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     Master

    Rough idle can be caused by basic ignition tune up items (plugs, wires, cap, rotor...), or even EGR flow issues. Not to mention fuel injectors. Your "tune up" - what did it include?

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    Visitor, December 27, 2010, 05:11

    plugs,wires cap ,rotor about 2 yrs ago. 1 fuel injector over the summer

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    DaveJHM, December 27, 2010, 21:16
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     Master

    You could have another injector. You could have an ignition system issue again. Only way to tell anything is to have a diagnostic tool hooked up to check specific components...can help.

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