Hello jemiller58
Check ignition system for problem (coil or plug) that affects Cylinder 4
Fuel delivery component fault that affects only Cylinder 4 (i.E, a contaminated, dirty or sticking fuel injector)
Base engine mechanical fault that affects only Cylinder 4 or air leak in the intake manifold, or in the EGR or PCV system.
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Sunday, March 28th, 2010 AT 3:30 PM