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Thread: Idle won't go below 2k

  1. 08-31-2008 #1
    97rs4life
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    Idle won't go below 2k

    Just got done installing a new engine in my 97 camaro. It is a 3.8l v6. When I fire it up it goes right away to 2100-2200 RPMs and doesn't go down. I checked the vac lines and didn't notice any leaks or loose connections. I am unsure with what the problem is unless the tb blade is not closing all the way and sealing it off. The tps shows 0% so maybe there is some air slipping around the sides otherwise. I dunno, hopefully somewhere here can help me. Below is a quick scan of one start up and my tune
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  2. 08-31-2008 #2
    Russ K
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    The TPS is at 0%, so the throttle is closed. Was the throttle body ported? Check for vacuum leaks.

    Russ Kemp
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  3. 08-31-2008 #3
    97rs4life
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    would the map readings show a vac leak if there was one?
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  4. 09-05-2008 #4
    n0dih
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    Yes, but you need to compare them to the exact same conditions without a problem. So no....

    If TB is closed, and IAC isn't stuck open, then there HAS to be a leak. Any holes drilled in the blades? Too large holes will cause it.

    If TPS is showing blades closed, verify the actually ARE closed.


    Quote Originally Posted by 97rs4life
    would the map readings show a vac leak if there was one?
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  5. 09-06-2008 #5
    JerryH
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    Don't forget to do the TPS relearn feature.
    '99 Black GTP Sedan
    3.4-2.6" PB Quick Change pulleys, Custom CAI, XP Cam, N* TB, LQ4 MAF, SLP headers, 42.5# Injectors, 180/195* thermostat.

    13.501 @ 103.392 on 91 (2.4 60-foot).
    13.82 @ 105.28 on 87 octane! (2.42 60-foot).
    263kph top end as shown on the GPS.
    All this and 39MPG to boot. What more can a man ask for?
    * Just another enthusiastic amateur tuner! *
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  6. 09-06-2008 #6
    krunchss
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    You beat me too it Jerry! I was gonna suggest that as well. I never had an idle problem that high, but when I did the TPS relearn, idle was much better.

    Hmmm, TPS sensor problem maybe? Not sure what it would idle like then, but someone said "0%" throttle. I usually look at the TPS voltage at idle which is always tiny, but not 0.

    Krunch
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  7. 09-06-2008 #7
    JmalibuSS
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    What are the chances you have a intake manifold leak? Or bent Throttle body blade?
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  8. 09-08-2008 #8
    97rs4life
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    the tps sensor was bad. what are the steps for the tps relearn
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  9. 09-08-2008 #9
    krunchss
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    Something Like...

    key on - wait 5 seconds - key off

    fully depress gas pedal - key on - wait 5 seconds - key off - release gas pedal

    key on - wait 5 seconds - key off

    fully depress gas pedal - key on - wait 5 seconds - key off - release gas pedal

    key on - wait 5 seconds - key off

    fully depress gas pedal - key on - wait 5 seconds - key off - release gas pedal

    key on - wait 5 seconds - key off

    fully depress gas pedal - key on - wait 5 seconds - key off - release gas pedal

    Start engine...

    (Cut & Paste from the DHP Board, courtesy of "TommyGloves"

    Krunch
    2002 Monte Carlo SS "Project Intimidator"

    [*DHP PowerTuner*] [L36] [180 TStat] [ZZP HVTB] [HV3] [Resonator & U-Bend Delete] [Carsound Hi Flow Cat] [Corsa Catback] [P&P OEM Manifolds] [Precision PT61] [ZZP Trans] [3000 Stall] [2.93 Gears] [F-Body Calipers] [Water-To-Air IC] [AFCO Ford SVT HE] [IAT Post-IC] [Bosch IC Pump] [9.5L System Fluid Capacity]
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  10. 09-09-2008 #10
    97rs4life
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    thanks for that info Krunch. I will try that out
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  11. 09-10-2008 #11
    JerryH
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    It may not have 100% effect the first time. After doing the TPS relearn, TPM may drop to 1500. Let car run a couple minutes, turn off, wait 30 seconds, turn on... drops to 1200.. then 1000... then 800 or so.

    Final RPM cannot be decided until ALL fluids are up to normal operating temp. Do not expect your car to run at 750 RPM during the first 5 seconds in 30F degree weather.
    '99 Black GTP Sedan
    3.4-2.6" PB Quick Change pulleys, Custom CAI, XP Cam, N* TB, LQ4 MAF, SLP headers, 42.5# Injectors, 180/195* thermostat.

    13.501 @ 103.392 on 91 (2.4 60-foot).
    13.82 @ 105.28 on 87 octane! (2.42 60-foot).
    263kph top end as shown on the GPS.
    All this and 39MPG to boot. What more can a man ask for?
    * Just another enthusiastic amateur tuner! *
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  12. 10-08-2008 #12
    02bluegt
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    The IAC may need to be re-learned, when I had a bad one and replaced it, the car reved at 2300 untill I did the whole cruse at 40 so it can re-learn thing....
    02 GP GT top swaped...some other mods, headers waiting to go in
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  13. 02-19-2009 #13
    LSChris
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    Quote Originally Posted by 02bluegt View Post
    The IAC may need to be re-learned, when I had a bad one and replaced it, the car reved at 2300 untill I did the whole cruse at 40 so it can re-learn thing....
    Is there a relearn procedure for the IAC as well?... What is it?
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