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  1. #1

    Unhappy 99 suburban running funky

    ok so i have a 99 suburban 5.7 k1500 automatic and its running funky i start it and it runs fine sometime other times it feels like its missing but then it warms up to temp i turn it off and then go back later and its fine or not so what its doing is missing and spitting but only some times its baffled me check wires cant find vac leak fuel filter changed cleaned egr checked plugs looks good any ideas wood be great thanks guys
    Last edited by bigggdaddy1999; 08-09-2010 at 08:02 AM.

  2. #2

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    Welcome to the club. When was the cap and rotor changed?

  3. #3
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    Welcome aboard.....
    Mike

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  4. #4

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    I'm moving this to the powertrain forum.

    I'd probably start with some basic diagnostic tests. pull codes from the computer to see if the PCM is reporting anything. Check the fuel pressure (especially when it is acting up) to see if there's a problem with fuel delivery. Check for vacuum leaks or spark leaks.

    ---------- Post added at 09:02 PM ---------- Previous post was at 09:02 PM ----------

    I'm moving this to the powertrain forum.

    I'd probably start with some basic diagnostic tests. pull codes from the computer to see if the PCM is reporting anything. Check the fuel pressure (especially when it is acting up) to see if there's a problem with fuel delivery. Check for vacuum leaks or spark leaks.
    '98 K1500 Suburban LS 5.7 L 4L60E NV246 ARB
    '92 Ford Explorer XLT 4x4 4.0 L A4LD BW13-54 Trac-loc rear
    "My toys were the greasy cogs and springs and pistons that lay around all over the place, and these, I can promise you, were far more fun to play with than most of the plastic rubbish children are given nowadays." Danny in Roald Dahl's Danny The Champion of the World

  5. #5

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    thank you very much

  6. #6

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    ok cap and rotor havent been changed cause of the way its been acting computer has been checked no codes

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