4.0

definitely annoying
Typical Repair Cost:
No data
Average Mileage:
34,000 miles
Total Complaints:
1 complaints

Most Common Solutions:

  1. not sure (1 reports)
2004 Jeep Wrangler engine problems

engine problem

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2004 Jeep Wrangler Owner Comments

problem #1

Jan 312008

Wrangler Rubicon 4.0L Straight 6

  • Manual transmission
  • 34,000 miles

A D V E R T I S E M E N T S

My Jeep Wrangler Rubicon idles well when first started but as it warms up it begins to idle roughly and the idle drops a couple hundred RPM. It seems to be using too much fuel but it is hard to say as I run larger than stock tires. Lately it has been producing the occasional skip or hesitation when under load. The problem is slowly worsening. I have played with the idle air controller and cleaning it seems to help for a few minutes but the problem always returns. I replaced the idle air controller but it made no difference. The water temp sensor was replaced as well and also made no difference. I do have a snorkel on the Jeep but it runs the same when I remove the plastic air intake directly from the throttle body. ANY IDEAS?

- , Londonderry, NH, USA

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