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Type: Posts; User: randyr8845

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    Thats a great idea. I'm gonna do a full cold to...

    Thats a great idea. I'm gonna do a full cold to warm drive, tracking all the parameters as a baseline. The software has a data logging feature to a text file. Then I can graph things in a...
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    You are correct. I also checked my Haynes manual...

    You are correct. I also checked my Haynes manual and saw that the spec is 60 to 66psi. Today I disassembled the upper intake, took the regulator out, and went back to Autozone where I bought it 7...
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    The scanner is a Elm5 I got it off Amanzon with...

    The scanner is a Elm5 I got it off Amanzon with the OBDWhiz software for $28


    ...
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    Test drive with the new MAF didn't go well. ...

    Test drive with the new MAF didn't go well.
    Here is what I did. In the off chance that the K&N air filter oil was fouling the MAF, I went a got a Purolator air filter and drove with the new MAF...
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    I got a fuel pressure gauge from autozone and...

    I got a fuel pressure gauge from autozone and measured the fuel pressure. Its 50psi at idle and shoots up to 67 when I rev it. If memory serves me correct, 50-60 is the proper range for this engine....
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    Just FYI, here are the one minite charts for the...

    Just FYI, here are the one minite charts for the stumble(with "bad" MAF plugged in).
    revs 2,3, and 4 stumbled. The rest did not. Notice that the STFT kicks in on rev 5 through 7. I guess I don't...
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    I went down to the garage and captured a 1 minute...

    I went down to the garage and captured a 1 minute chart of the stumbling with the engined reved after a start. Then, before comming back to post the results, I performed another test that was...
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    Good suggestion. I can reduce the chart time to 1...

    Good suggestion. I can reduce the chart time to 1 minute and try and capture the stumbling. I am going down to the garage now and will try it.
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    yes, The stumble only happenes after I start the...

    yes, The stumble only happenes after I start the engine and press the gas pedal. After stumbling for 5-15 seconds, the truck runs "fine", but gets poor gas milage and seems bogged down a bit. The...
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    dpeter, Thank you for your reply. I cannot...

    dpeter,
    Thank you for your reply. I cannot monitor fuel pressure except with a gauge to the service port on the fuel line as it goes into the injectors(the "spider"). I can monitor fuel rate from...
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    4.3l engine data and help on diagnosis.

    Hi,
    I am new to the forum and have a specific problem with my truck that I have been working on for months. Here is the vehicle description, problem description, data, and parts that have been...
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