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Thread: Rough Engine Idle

  1. #1
    Fresh Catch
    Join Date
    Jan 2016
    San Diego, Ca

    Rough Engine Idle

    I have a 2002 Jeep Wrangler Sahara 6 cylinder with 82 K miles. It doesn't seem to be missing when I drive, but the Check engine light blinks. The Code indicates "Missing" , and it has a rough Idle. I have changed the Spark Plugs and the Coil Pack with NO Difference. Has anyone else experienced this symptom, or have any idea what to check next. Thank you in advance for your suggestions. I can be reached at Riflmn3006 aol com.

  2. #2
    The Original Smartass piginajeep's Avatar
    Join Date
    Oct 2011
    Bear Valley Springs
    Have you checked the throttle position sensor ?
    2012 JK8
    1958 FC170 (Jeep Forward Control)
    1953 M38A1

  3. #3
    Addict BaddestCross's Avatar
    Join Date
    Aug 2016
    Palmdale, CA
    Welcome to WAL.
    Check throttle position sensor and cam (crankshaft?) position sensor. Also, how are the temps? There is an issue with the later 4.0s getting hot and causing a miss in cylinder 3.

    What codes are popping?

    Build Thread - Adventures of Fiona -
    Build Thread: The Adventures of Fiona
    '08 JKR Rescue Green 2-Door

  4. #4
    Fresh Catch mntj91's Avatar
    Join Date
    Feb 2017
    Crank position sensor possibly?

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