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Thread: L5 harrop supercharger goes lean???

  1. #1
    Junior Member
    Join Date
    Jul 2009
    Posts
    14

    Default L5 harrop supercharger goes lean???

    Greetings, I am tuning an L5 colorado.

    At 10000 hz the afr goes leaner and leaner, we swaped for a bigger fuel pump and a 58psi regulator. Now fuel pressure is constant at 58 psi and the AFR keeps goin leaner. Do you have an idea of what is running bad? when the trucks shifts it goes to the commanded AFR and at 10000hz goes leaner.
    At that time inj were 70%, then I did some MAF raping and got 90% INJ and afr still goes lean and pressure does not drop.

    Sorry for my english, its not my native language

  2. #2
    Joe (Moderator) joecar's Avatar
    Join Date
    Apr 2003
    Posts
    28,403

    Default

    Hi Migel, can you post some log files for everyone to look at...

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