I have a 1993 jeep zj and just started to keep rough also the oil pressure while accelerating goes up to 60 but backs down to 40 not accelerating?

Asked by Jan 28, 2016 at 06:46 PM about the 1993 Jeep Grand Cherokee Laredo 4WD

Question type: Maintenance & Repair

I have a 4.0 engine, automatic, low mileage 130,000. All of a sudden
it started to run rough at park or idle. I check the vacume lines OK
and battery is good. All fluid levels OK. It hasn't been
overheating.tranny was flushed last year and new radiator.  No check
lites except abs light is on. Just had oil changed 1500 miles. So does
the high oil pressure and rough idle/dying have in common PCV?

1 Answer

57,515

Just the idle. PCV may needing replacing, check the vacuum hose for cracks, check all vacuum hoses for cracks and replace as necessary. Oil pressure sounds good. Also it just may need a tune-up. The ABS code would need to be read by a scanner to see what it is. It can only be reset when the problem is fixed, and the code cleared by a scanner.

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