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Thread: I need a kick in the head/new eyes

  1. #1
    Tuner in Training
    Join Date
    Aug 2009
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    41

    I need a kick in the head/new eyes

    I'm finally back into working on my project and now I'm completely lost.

    Here is what the LS1 has: F13 cam, FAST 92/92, Patriot heads, Z06 MAF, 42# (green) injectors.

    Back during the warm weather it would run rough until warmed up. Now, I foul plugs like there's no tomorrow and the car won't idle on it's own (its been in the 30's F over the weekend.

    For a brief moment it started and ran well, then just died 10 seconds later. Today with what I thought was a very similar tune, was pure hell.

    I followed the start up links but I must be missing something. It's running so bad I can't even get a log

  2. #2
    Advanced Tuner
    Join Date
    Jul 2009
    Posts
    509
    What car is the engine associated with?
    2016 GMC Sierra 1500 6.2L

  3. #3
    Tuner in Training
    Join Date
    Aug 2009
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    41
    Its in an 89 Firebird. Full LS harness swap and whatnot.

  4. #4
    What kind of tune did you start with? And is the injector data correct?
    -------------------------------------
    01 SS Red A4 #4987

  5. #5
    Tuner smokestack's Avatar
    Join Date
    Jul 2011
    Location
    West terre haute Indiana
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    111
    Looks like everything is shut off? Stft Ltft and the maf. Plus idle air is zeroed out for P/N.

  6. #6
    Tuner in Training
    Join Date
    Aug 2009
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    41
    I started with with a stock 2002 Firebird tune and changed the fuel injectors as per the info I was able to dig up. Am I positive it's correct? No, but I have no concrete data to compare it to.

    It looks like I turned off a little more than I should have. STFT are back and a few other idle parameters.

    I have been playing around with the base running idle airflow and it doesn't seem to have any effect on how the car runs/idles.

    Today I put in some OEM parameters and changed the open loop EQ ratio with some success. As you can see in the log, my IAC counts are a little high, but it seems if I mess around with the idle screw and resetting the TPS, all hell breaks loose.