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  1. #1
    Member The Heater's Avatar
    Join Date
    Apr 2010
    Location
    Upstate SC
    Posts
    158

    Does this sound like a ECU problem ??......

    So here is what I have going on.....1997 200hp EFI #0G451791 that is idling very poorly while out of gear and constantly stalling out while idling around in gear. I am Also having to pump primer bulb several times during the day. Here is a list of everything I have done to the motor recently trying to correct the problem. Any help or insight is appreciated.

    - New fuel lines and bulb. (Tank to bulb & bulb to pulse pump)
    - New BU8H Plugs
    - New Filter
    - Always try to run Dons Quicklean cocktail in my gas.


    What I have Checked:
    - Compression is all good. (Cold 115 - 118 )
    - Air Temp Sensor
    - Cleaned the small filter at the Fuel Pressure Reg.
    - Verified that Electric Fuel Pump running.

    What I have noticed about the motor:
    - Motor seems to start and run better at the beginning of the day.
    - Motor wants to bog\load-up when taking off.
    - Motor runs well on Top End.

  2. Member The Heater's Avatar
    Join Date
    Apr 2010
    Location
    Upstate SC
    Posts
    158
    #2
    Also have recently rebuilt the Pulse Fuel Pump. (Motor was acting up before I did this too.)

  3. Member
    Join Date
    Jun 2013
    Location
    LONGVIEW TEXAS
    Posts
    14,017
    #3
    not really, check for spark on all 6 when problem is occurring
    .................................................. ...the scariest thing in life is the unknown ...................................