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96 Escort runs rough


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gizm0327
01-06-2008, 09:28 PM
New plugs and wires, new coil pack, keeps throwing a code that number 3 cylinder miss fire. Not sure what else to try. Any ideas?

Thanks

Davescort97
01-07-2008, 03:06 AM
New plugs and wires, new coil pack, keeps throwing a code that number 3 cylinder miss fire. Not sure what else to try. Any ideas?

Thanks

A cylinder specific misfire indicates that either compression, appropriate fuel mixture, or spark is missing. Start with a visual inspection, looking for a vacuum leak near the cylinder. A defective PCV valve with it's inlet near the #3 cylinder could cause a lean condition. Check the compression on the target cylinder to insure that the engine is mechanically sound. Use a stethoscope to listen to the injector on the cylinder. Listen for distinctive clicks and compare to enother cylinder. I use a length of hose to the ear to check injectors. A misfire is not solely an ignition problem.

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