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Hiccup at 4000 rpm

This is a discussion on Hiccup at 4000 rpm within the General Help forums, part of the LSx Technical Help Section category; Help!, I have a 2001 Corvette convertible. The engine runs great up until 4000 rpm. At that point, the engine ...

  1. #1
    jmhibbitts1
    Guest

    Hiccup at 4000 rpm

    Help!,
    I have a 2001 Corvette convertible. The engine runs great up until 4000 rpm. At that point, the engine hesitates between 3800-4000 rpm, then it immediately smooths out and continues to run fine to 6000.
    What could be the problem?
    Thanks!
    John H.

  2. #2
    Junior Member
    Join Date
    Dec 2005
    Location
    pgh pa
    Age
    32
    Posts
    66

    black
    99 chevy camaro Z28

    my 99 Z28 did the same thing i had the maf cleaned and it needed two up stream o2s

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