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Thread: 2011 KK (Liberty) CEL - Need Advice

  1. #11
    Meme King WJCO's Avatar
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    Are you getting those leak down specs from the service manual or from instructions that came with the tester? 30-44% seems high to me.

    As far as your compression numbers, those seem close enough to not worry about IMO.
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  2. #12
    Old Timer sipafz's Avatar
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    I donít know what the actual specs are yet. Iím just going by the gage. Like I mentioned, I was having issues with the gage due to how cold my garage is. Iím going redo the test on a warmer day which may led to the gauge reading differently.

    Iím encouraged by that I couldnít hear or see any glaring problem. I started it up this morning and the CEL remained off.

  3. #13
    Old Timer sipafz's Avatar
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    Update: After a week of the harshest weather this season, I was cautiously optimistic that the plug wires were the issue. No CEL during the stretch of -30 temps. Unfortunately as the temps got closer to freezing the CEL came back on, P0302. I took a look and as I was moving around the new plug wires I noticed a manifold bolt/stud with a wire route clip rotate. Not just the clip, but the whole stud rotated. I tightened it back to 105 in/lbs and checked all the other bolts. I found that the bolt next in line was also loose and as luck would have it these loose bolts were by cylinder 2 & 4. I have no idea how those bolts would come loose as I have never touched them in the past. Anyway, those are tight and will see if that makes a difference. Maybe a vacuum leaking was happening during cold start and improved as the engine warmed?

    I got my bottle of BG44K and added it to the fuel system. I plan repeating the leak down test in a few weeks and hope this stuff helps the minor leak on the #6 intake valve.

    New complaint from the wife is that the heat is blowing cool on the drivers side and hot on the passenger side. Iím going to flush the heater core today. 3 more years and Iíll be happy to let this Jeep go in trade for a new JLU or JT

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