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TBI Code 44

Discussion in 'The Injection Section' started by Cricket, Feb 11, 2007.

  1. Cricket

    Cricket 3/4 ton status

    Nov 29, 2004
    Likes Received:
    I had been getting an intermittant code 44 on my TBI swapped 77 K10. Code 44 = Lean exhaust reading at the O2 sensor.

    It would pop the light sometimes at idle and sometimes at cruise. So I put together my checklist and went out to troubleshoot. Started with the easy stuff like O2 sensor wires and vac lines. I got under the hood to hook up a fuel pressure gauge and disconnected the line. While nudging the fuel line around I notice my TBI is doing the twist. The friggin TBI unit was loose, I can't believe the damn thing was even running. :haha:

    I haven't had it out for a run yet but it sure ran smooth at idle and didn't throw a code after being tightened. Anyhow if your throwing a 44, have a significant mileage decrease, or are running rich check your tbi unit first. :doah:

  2. southernspeed

    southernspeed 1/2 ton status Premium Member GMOTM Winner

    Dec 24, 2003
    Likes Received:
    Loose nuts Sir?:p:

    May your nuts forever stay tight!:D

    yeah, yeah....I know they're bolts but I could crack a gag about bolts!:rolleyes:

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