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Thread: LM7 383 Build Up

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  1. #1
    Join Date
    Nov 2009
    Location
    Fort Smith, Arkansas
    Posts
    496
    Any PCM codes? Does the truck run poor?
    '91 2WD RCSB
    5.3l L59 DBW
    4L80E
    TR220 cam
    RevMax 2800rpm stall converter
    Schoenfeld LT Headers
    Nelson tuned

    My Truck Video - http://www.youtube.com/watch?v=Rw9y1...&feature=email

  2. #2
    Join Date
    Nov 2003
    Location
    Denton Texas
    Posts
    20,540
    very likely bad 02 sensors. Have the 02 levels scanned with a wideband
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709

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