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454 gas/propane problems

Discussion in 'Medium-duty Truck Forum' started by rconley1879, Jul 7, 2012.

  1. rconley1879

    rconley1879 New Member

    2000 6500 old Schwans truck (propane) with Jerr-Dan rollback, acts like it has a rev limiter set at 2000 rpm's. Starts great, pulls good until around 2000 rpm then acts like someone is turning the key on and off. Let off the pedal and it runs great until around 2000 rpms again.
    HELP PLEASE

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