Idle probs

Discussion in 'General Discussion' started by Colton Dye, Apr 15, 2019 at 3:18 PM.

  1. Colton Dye

    Colton Dye New Member

    I've noticed when I start my truck up(98 4.0l v6) that itll fluctuate from 1200rpm to 600rpm, and it will do this until it gets warm enough to stay at 600rpm. Any ideas on why it does this?
     
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  3. OldTimer

    OldTimer New Member

    Check your ETC. I wonder if it's 'shorting' showing a really (-10F) cold engine, then it improves when it gets a bit warmer. Is that truck equipped with an EGR system? My daughter's Taurus would rev up n down until it warmed up a bit, vac leak in the EGR system.
     

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