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Thread: Truck retarding timing???

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  1. #1
    Join Date
    Aug 2008
    Location
    North Texas
    Posts
    12,078
    Not right. MY slow GMC with no FI got a new tune yesterday and I tested the KR to 100 WOT and got -1 and the 1-2 for less than half a second. Did you up the boost without a new tune?

  2. #2
    Join Date
    May 2008
    Location
    wichita falls, tx
    Posts
    613
    no i havent messed with the boost at all but it is retarding even if i punch it from a dead stop even before boost becomes an issue

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