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  1. #1

    Default "My Brother-in-Law Has a 2001

    "My Brother-in-Law Has a 2001 cruiser with twin 7.4 MPI Horizons. The starboard engine is alway hard starting. When it does start it runs like it's running rich. The black smoke confirms this. We replaced the fuel pump, fuel cooler, regulator and the Fuel/Water separator even reset the computer. The engine runs perfect beyond idle. I'm thinking it's the idle circuit and/or its components. Maybe a partially plugged air oriface. Anyone care to comment or have any ideas?


  2. #2
    Join Date
    Jan 2008
    Lakehills, Texas, USA

    Default "Maybe dirty injectors are not

    "Maybe dirty injectors are not letting the fuel atomize properly. I would also verify base timing. Verify fuel pressure and Yes, check the idle air control and it's ports are clean and the throttle body as well. If all else fails try swapping ecm's and see does problem follow.


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