Truck cranks but not drivable

Discussion in 'Engine Performance + Maintenance' started by Braddf, Jun 11, 2019 at 9:59 PM.

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  1. Braddf

    Braddf Newbie

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    1992 350. Truck had absolutely no issues prior. Driving down the road took a turn and it just cut off. Since then whenever I go to crank it it takes a little longer and when it does fire up it revs up and down almost to the point it cuts off, occasionally it will stall. Giving it some throttle does the same thing rpms go up then back to nothing almost stalling out. Replaced the oxygen sensor and the egr valve which it was giving codes for with little improvement. Also seems like I can smell gas. Any ideas what my next move should be?
     
  2. Eveready

    Eveready I'm Awesome

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    Fuel pump most likely. Probably primes but that's it. Just a guess but if you have around 100K or more on a pump you likely are at or near end of life on it. Fuel pressure test would likely diagnose.

    Welcome to the forum. Keep that truck in the road .
     
  3. Schurkey

    Schurkey I'm Awesome

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    What is the fuel pressure?

    What is the data stream showing when you connect the scan tool?
     
  4. 91c1500sleeper

    91c1500sleeper Newbie

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    I second the fuel pump is going out.
     
  5. Braddf

    Braddf Newbie

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    Appreciate the responses I’ll check it out see what happens.

    It’s not really a scan tool. It’s one of those you just slide into the port and it makes the service light flash to tell you what the code is.
     
  6. Braddf

    Braddf Newbie

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    Also you can smell gas coming out of the exhaust if that means anything to anybody
     
  7. Schurkey

    Schurkey I'm Awesome

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    OK, I'll re-word:

    GET a scan tool, check the data stream.
     
  8. PlayingWithTBI

    PlayingWithTBI Desert Old Guy

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    X2
     
  9. Braddf

    Braddf Newbie

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    It was in fact the fuel pump going out on me. Ripped the bed off and slapped a new one in there now in runs better than it ever has for me. I appreciate everyone’s help I would have been tinkering with it for a long time if it wasn’t for this forum.
     

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