1999 Jeep Grand Cherokee Logo
Posted on Mar 23, 2012

I bought the car in January. I changed the spark plugs last week, there was nothing left of the plugs that were in already. Now it's running like **** with new plugs in, why?

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Chris Dryna

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  • Posted on Mar 23, 2012
Chris Dryna
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Check plug gaps against specs. Also should have replaced wires with the plugs. any misfires should show up on your check engine codes.

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