MY OS RUNNING VERY ROUGH WHAT COULD BE THE CAUSE

1999 Ford Expedition

Tiny

Dutchron

May, 6, 2012 AT 2:37 AM

Engine running very rough

FOUND 4236 RELATED QUESTIONS

Running Rough

27 ANSWERS
34 IMAGES

Idles Rough/changed Ects

37 ANSWERS
3 IMAGES

2 Answers

Tiny

Jacobandnickolas

May, 6, 2012 AT 3:02 AM

Check for tune up, check fuel pressure check engine compression.

Tiny

djcl

May, 6, 2012 AT 6:59 AM

Spark plugs and coils are common to do this on this truck. If you have a scanner check codes see which cylinders are counting miss fires and swap coiles to see if the miss has moved

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