1999 5 spd 7.4 dies at idle

Discussion in 'The Garage' started by Across281, Nov 6, 2019.

  1. David Barry

    David Barry Newbie

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    I am having a problem with my 5.7 going into a low idle at a stop and occasionally dying. You say that it's fine in the driveway. I'm assuming that it's in park. Mine does well until it's in gear at a stop. Don't know if this info could be a clue. I'm not 'engine savvy.'
     
  2. Across281

    Across281 Newbie

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    Mine is a standard trans, but if you figure yours out it may help me.
     
  3. Across281

    Across281 Newbie

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    Ok, I have now replaced tps, and iac, still died on me. I have a new maf coming in a few days which I hope is the problem to finally solve this.
     
  4. 454cid

    454cid Sooper Pooper

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    A Vortec will run without a MAF. The PCM runs in speed density mode.
     
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  5. Christian Steffen

    Christian Steffen I'm Awesome

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    Just unplug it and see how it runs.
     
  6. Hutchinson

    Hutchinson OBS Enthusiast

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    Do you know anyone with HPTuners or EFILive to do a data log for you? Sucks to keep changing parts and not resolving (I’ve been there tooooo many times). I bit the expensive bullet and got HPTuners, for both tuning the 0411 ECM, and for troubleshooting. Like 454cid said, try unplugging your MAF to see if it does same thing.
     
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  7. Hutchinson

    Hutchinson OBS Enthusiast

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    Apologies, like Steffen and 454 said.
     
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  8. Across281

    Across281 Newbie

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    Well here's some sh!t, I looked up vin on TIS and truck had been brought in twice for new software to eliminate false egr stuck open p1404. I have not gotten this code but have replaced egr so my next thing will be to run without it plugged in and see what happens.

    Unplugging oem MAF it runs the same no difference. Not better not worse.
     
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  9. Christian Steffen

    Christian Steffen I'm Awesome

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    You can probably send your new maf back.
     
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