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1990 3.0 Running Very Rich

Discussion in '2nd Gen 4Runners (1990-1995)' started by CM49, Sep 24, 2018.

  1. Sep 24, 2018 at 8:07 PM
    #1
    CM49

    CM49 [OP] New Member

    Joined:
    Sep 24, 2018
    Member:
    #7270
    Messages:
    1
    Gender:
    Male
    Hey all! I just purchased a 1990 4runner 3.0 for a pretty good price. The body is in great condition but the engine seems to be running verrrry rich.
    Upon accelerating *unless i very slowly ease into the accelerator* the car will stall for a second, shoot a small ploom of black smoke, then continue on its way. You can also smell the unburned fuel just having the car idle
    This has caused the car to stall out completely when trying to accelerate from a stop, especially going uphill.

    I had just changed the spark plugs today to no prevail, and the old ones were wet upon removal.. I also checked compression on each cylinder and compression is just fine.

    Any ideas on why the car would be running so rich?
     
  2. Oct 10, 2018 at 9:15 PM
    #2
    Dink

    Dink New Member

    Joined:
    Aug 18, 2018
    Member:
    #6799
    Messages:
    9
    Gender:
    Male
    First Name:
    Chris
    Vehicle:
    1993 4Runner SR5
    Stock with roof rack
    Vacuum leak? Fuel pressure regulator?
     

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