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Rough idle

Tiny
JC CARLISLE
  • MEMBER
  • 2003 JEEP LIBERTY
  • 3.7L
  • V6
  • 4WD
  • AUTOMATIC
  • 70,000 MILES
Engine idles very rough and scanner shows misfire on cylinder one and four. Coils and plugs are only seven months old. Swapped coil and plug from cylinder one to cylinder three to see if error followed but does not. Some indication of moisture in oil fill.
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Sunday, February 4th, 2018 AT 7:28 AM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,973 POSTS
Hello,

I would start by removing the spark plugs on one and four and seeing what they look like? Dry black? Also, does the engine sound normal when you are cranking it over?

Please let us know what you find.

Cheers, Ken
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Monday, February 5th, 2018 AT 11:26 AM

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