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Thread: 1988 Suburban 5.7 TBI, Just died!!!

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  1. #1
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    1988 Suburban 5.7 TBI, Just died!!!

    I started it up, Let it run fir 5 min, then Pow!!! It just died! Everthing has power, It turns over, just no fire! I cannot find anything wrong! Checked all fuses and the ECM Fuse was blown, Replaced it and still nothing.
    Any help or directions would be Great.

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    Re: 1988 Suburban 5.7 TBI, Just died!!!

    when you replaced the ecm fuse and cranked it over again did it blow the fuse again?
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    Re: 1988 Suburban 5.7 TBI, Just died!!!

    Nope, Fuse is good.

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    Re: 1988 Suburban 5.7 TBI, Just died!!!

    possibly could have fried the ecm. try a crank relearn maybe? could be your best bet.
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    Re: 1988 Suburban 5.7 TBI, Just died!!!

    Replaced the Ecm, Still the same.
    But now I found that my Headlights dont work.

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    Re: 1988 Suburban 5.7 TBI, Just died!!!

    Start with the basics. Fuel pressure, spark.

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    Re: 1988 Suburban 5.7 TBI, Just died!!!

    I have fuel pressure, No spark.
    I think a wire is fried, If this was a older car, I'd say it was a fusable link.

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    Re: 1988 Suburban 5.7 TBI, Just died!!!

    there has to be a wire shorting out somewhere causing your issues. Pull out one fuse at a time and see if your truck starts. Ovioulst dont pull the fuses for the things your truck needs to run. Try pulling the fuses for the lights, wipers, etc. If the truck starts with one of those fuses out then your electrical issues is in that circuit

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    Re: 1988 Suburban 5.7 TBI, Just died!!!

    Could be the distributor or coil.

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    Re: 1988 Suburban 5.7 TBI, Just died!!!

    Here is what i found,There is no power to or from The ECMB Fuse, I ran 12 V to the top of the fuse and she fired right up. So i am pulling the fusebox out.
    Last edited by Widmayer; 04-20-2010 at 03:02 PM.

  11. #11
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    Re: 1988 Suburban 5.7 TBI, Just died!!!

    Traced lack of power to starter, Found a Fusable link smoked.

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    Re: 1988 Suburban 5.7 TBI, Just died!!!

    Glad you found it. Keep an eye on it, that fusible link melted for a reason.

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    Re: 1988 Suburban 5.7 TBI, Just died!!!

    nice job dude i hate electrical stuff, it just befuddles my mind and makes my head hurt when i try to figure them out haha

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