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Thread: P1391

  1. #1
    Join Date
    Jul 2014
    Location
    Central Pa.
    Posts
    133

    Default P1391

    Hi, I've been getting the po1391 code lately. At a red light in gear ,idling. The RPMS will drop and stumble occasionally. I reset my CELL with my code reader. Seems that somethings not right. Is it a cam sensor or crank sensor? Also an maybe related,I took the crank sensor off just to have a look and noticed the shaft has some play in it. Is that normal?

  2. #2
    Join Date
    Jul 2014
    Location
    Central Pa.
    Posts
    133

    Default Re: Po1391

    Sorry for the double post... this does have more info. 2001 4.0 auto.

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