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Thread: 2001 LQ4 SDTune idle will not come down - completely stuck

  1. #1
    Potential Tuner
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    Mar 2016
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    2001 LQ4 SDTune idle will not come down - completely stuck

    Here is my latest tune - scanner indicated low desired idle air flow. Go easy on me - very new to hptuners

    I cannot find any vacuum leaks.

    Car runs good while driving and under power. It will not idle under 950-1000 rpm in gear, or 1100 in P/N no matter what I try.

    01 LQ4 with gen iv rods/pistons
    220/227 .600/.600 113 LSA cam
    9.25:1 compression
    Siemens 80 lb injectors
    Stock truck manifold/tb
    on3 7875 turbo

    running 3-26.hpt

  2. #2
    Senior Tuner SultanHassanMasTuning's Avatar
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    Nov 2009
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    stock file?
    Follow @MASTUNING visit www.mastuned.com
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    Contact/Whatsapp +966555366161

  3. #3
    Potential Tuner
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    Apr 2016
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    Arkansas
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    I'm a complete noob as well and been gathering the best guides I find, give this one a try for idle.
    http://www.hptuners.com/forum/showth...e-(w-pictures)

  4. #4
    Potential Tuner
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    Mar 2016
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    I'm sorry - right after posting this, after dealing with it for days, I found a hole in the back of my intake manifold (truck intake) - I am guessing it got punctured somehow in storage or while installing it.

    I swapped the intake with another one off craigslist and retuned the idle and now it idles great.

  5. #5
    Tuner
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    Oct 2011
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    Australia
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    Good work

  6. #6
    Senior Tuner SultanHassanMasTuning's Avatar
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    damn, a hole.
    Follow @MASTUNING visit www.mastuned.com
    Remote Tuning [email protected]
    Contact/Whatsapp +966555366161