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What would cause a 2001 F-150 4.2L idle rough?

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βˆ™ 2010-12-18 18:25:08

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get an obd2 scan to check for codes. many causes; tune-up, tps sensor, egr valve and dpfe sensor, o2 sensors etc... so get an engine diag.

-Switch spark plugs to factory motocraft plugs. Cheep and efficient! Also eliminates spark knocking with manual transmition and hitching or hesitation. Good Luck!

2010-12-18 18:25:08
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