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TBI issues

Discussion in 'The Injection Section' started by nm4x4, Feb 26, 2007.

  1. nm4x4

    nm4x4 1/2 ton status

    Joined:
    Nov 24, 2004
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    Location:
    Wichita, Kansas (McConnell AFB)
    OK, 1989 burb TBI all stock. When it goes from open to closed loop it starts to stumble when I hit the gas (I checked to see when it switches from open to closed at A+B terminals at the ECM plug). It just started to do this. When it is cold it runs fine, I changed the O2 sensor and checked the TPS voltage, and EGR valve. I changed the fuel filter about 3 months ago. Also has new plugs and wires. It idles OK, I cleaned the IAC. When it downshifts into passing gear I can't feel it cutting out. I am at a loss?? Any help would be greatly appreciated!!

    Thanks in advance,
    Jake
     
  2. Cricket

    Cricket 3/4 ton status

    Joined:
    Nov 29, 2004
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    Location:
    Colorado

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