Different Idles?

Discussion in '1994 - 1995 Specific Tech' started by Terdfurgason, Jan 5, 2014.


  1. Terdfurgason

    Terdfurgason Member

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    Are there different idles for cruising and at a stop? My car seems to idle a couple hundred rpms higher until I coast down to below 5 mph then it drops what I'm guessing is its actual idle. My issue is sometimes my car will die during this transition. Its especially embarrassing in parking lots. The car is tuned with rock solid AFR so I assume its running correctly beyond this.
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  2. toyman

    toyman SN Certified Technician

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    There's more to tuning than a rock solid AFR. I suspect it's in the tune to the extent that the tuner probably didn't spend much time tweaking the idle parameter options. These might be:
    Hi Idle Car Speed X MPH
    Hi Idle RPM Offset X rpm
    Hi Idle Wait Time X Sec
    Idle Off if TP over X %
    Idle On if TP Below X %
    Idle FB Above X rpm
    Idle FB Below X rpm
    Idle A/C Load Comp X %
    A/C On Delay X Sec

    I can see where a couple of these parameters can, if not set correctly, can cause an idle issue.
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  3. Terdfurgason

    Terdfurgason Member

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    I'm glad to see that there are two different idles, wasn't sure if I was seeing a phantom hangup. I guess I'll call my tuner.
    Last edited: Jan 5, 2014
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  4. Decipha

    Decipha Member

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    its called dashpot, sounds like it needs more low rpm pre position and the dashpot minimum mph clup disabled if you dont like the couple hundred rpm hang

    has nothing to do with fuel
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  5. jrichker

    jrichker StangNet's favorite TOOL SN Certified Technician Founding Member

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    If the turner doesn't provide any help, see below...

    You guys with idle/stall problems could save a lot of time chasing your tails if you would go through the Surging Idle Checklist. Over 50 different people contributed information to it. The first two posts have all the fixes, and steps through the how to find and fix your idle problems without spending a lot of time and money. I continue to update it as more people post fixes or ask questions. You can post questions to that sticky and have your name and idle problem recognized. The guys with original problems and fixes get their posts added to the main fix. :D

    It's free, I don't get anything for the use of it except knowing I helped a fellow Mustang enthusiast with his car. At last check, it had more than 134,000 hits, which indicates it does help fix idle problems quickly and inexpensively.
    #5

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