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Thread: Anybody, somebody helpp!!!

  1. #1
    Tuner in Training
    Join Date
    Apr 2013
    Posts
    37

    Anybody, somebody helpp!!!

    Ok so I get my 98 trans am tuned drives fine, next morning i tried to start it an it wont stay running with out holding gas pedal.
    once car warms up it starts right up no problems whats so ever. the car can sit for 5 hours still fires right up. only time it give me problems is over night.
    Also when i get it to run on its own rpm holds at 1800 rpm in park. starts to come down on its own but not until 2mins later.
    can someone plz help with my file.

    mods list
    ls2 long block
    231/237 cam
    fast 92 ported nick williams 92 tb
    lukas 42 injectors
    zo6 maf
    long tubes
    yank 3600
    Attached Files Attached Files

  2. #2
    Senior Tuner
    Join Date
    Feb 2009
    Posts
    1,931
    Your base running airflow numbers are not realistic. Put stock numbers back in, mulitiply table by 1.25, find and run the Russ K idle airflow config. Your ve table in the idle area looks low, I would revisit your 800/1200 columns also.

  3. #3
    Tuner in Training
    Join Date
    Apr 2013
    Posts
    37
    well i made changes still same thing.
    i did a cold start data log. tps 5% is me holding the gas since it wont stay running on its own.
    Attached Files Attached Files

  4. #4
    Tuner in Training
    Join Date
    Apr 2013
    Posts
    37
    I'm running lucas 42#
    looked into my tune file for kpa 60.64 61.01 61.38 61.76 62.07 62.50 62.87 63.25 63.56 63.93 64.36 64.61 65.04 65.35 65.73 66.04 66.41 does this seem right?
    f

  5. #5
    Senior Tuner
    Join Date
    Feb 2009
    Posts
    1,931
    Post the tune you made the log with.

  6. #6
    Advanced Tuner blownbluez06's Avatar
    Join Date
    Jan 2008
    Location
    Forney, TX
    Posts
    982
    Although it's possible to tune around the wrong ETC scalar, it makes airflow calcs and everything wrong. You might want to put the right scalar in there, starting with something in the neighborhood of .0190.
    Your IAC should be logged so you're able to use it for feedback. If it's wide open on startup and you're unable to start it without some throttle, then you might need to open the throttle more and reset the TPS. One final tip: having fueling off can force you to have to try to compensate with airflow. If you're having to open the throttle to get the car to start, if the fuel is the cause, it would mean it's too much prime shot or startup fuel causing it.
    Hsquared racing engines RHS 427, Procharger F2, Moran Billet Atomizer injectors, Alky Control,Mast LS7 heads, Nitrous outlet kit,Tilton quad disc clutch, DSS shaft, RKT56 ZR1 trans, RPM Quaife diff. Built and tuned by yours truly.