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89 K5 code 44- but runs rich?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Chris Demartini, Jun 29, 2002.

  1. Chris Demartini

    Chris Demartini 1/2 ton status

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    <font color="blue">I was driving down the highway today and I was having trouble keeping up with traffic, it felt like the motor had no power. It used a ton of gas and it had that rotten egg smell when the cat is clogged. It also has an idle miss (idles rough, hesitates badly from a stop) and it stalled out twice. I think there may be a problem inside the distributor. It doesn't burn any oil, the plugs, plug wires, O2, fuel filter, air cleaner and EGR are new. The SES was not on, but I checked for codes anyway and got code 44 (lean exhaust). The cheesy Haynes manual said I need to check fuel pressure. Where do I hook up the guage? Why would it set a lean code when it is obviously running rich?
     
  2. jc71355

    jc71355 1/2 ton status

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    This is just a guess but maybe the engine thinks it's running lean so it's dumping more fuel than needed, thus creating a rich state. I get code 44 multiple times daily. I need to change the fuel filter and i think it will clear up. I'm not sure on how to hook up the fuel pressure guage. Hope this explains why it's running rich.

    James
     
  3. Chris Demartini

    Chris Demartini 1/2 ton status

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    <font color="blue">Yeah, that makes sence since limp-home mode is rich, but this is really rich! I'm going to try and find a new rotor and cap tomorow so I can get to work on monday.
     
  4. 4X4HIGH

    4X4HIGH 1 ton status Premium Member GMOTM Winner

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    I just had the exact same problem with my "89" blazer. I replaced the 02-sensor and nothing, but after I replaced the fuel pump, my problem is all gone now. /forums/images/icons/smile.gif
     
  5. Chris Demartini

    Chris Demartini 1/2 ton status

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    <font color="blue">I just happen to have a spare fuel pump, I will try that if nothing else works. thanks!
     
  6. BurbinOR

    BurbinOR 3/4 ton status

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    Is this with your TPI setup?
     
  7. Chris Demartini

    Chris Demartini 1/2 ton status

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    <font color="blue">No, it's my 89 K5. I still gotta get the tank in, run the lines and do a few other things before the blue one with the TPI runs. What's a good PC-based scanner program? I might be getting a cheap used laptop this week
     

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