TENGINE RUNS ROUGH, MISFIRES

1991 Ford Ranger

Tiny

jffatbass

May, 26, 2013 AT 5:44 AM

1991 ford ranger 2.3 litre 4 cylinder. Engine runs rough when driving, misfires. Ran diagnostics said coil pack right side, changed right side coil pack, not the problem, no spark to one of the coils, also, when Tachometer is malfunctioning, the engine misfires and no power, sluggish.
When tachometer is functioning properly engine runs fine. Starts fine when at temp, rough when cold, tune up next, maybe cylinder not firing on back left sparkplug? EGR or PCV valve?

FOUND 4487 RELATED QUESTIONS

Running Rough

27 ANSWERS
34 IMAGES

Idles Rough/changed Ects

37 ANSWERS
3 IMAGES

1 Answer

Tiny

hmac300

May, 26, 2013 AT 8:35 AM

Check your module or see if an auto parts can check it for you. Also check the ground to the module it may be part of the problem.

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