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Thread: Attempting to get tune correct so no gas pedal is needed on cold starts...

  1. #11
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    Quote Originally Posted by joecar View Post
    I'm still looking and thinking...
    Thank you, appreciate it

    Quote Originally Posted by slows10 View Post
    Cam specs?? Idles at 54-56 kpa Probably not real big I hope. Why are you setting the idle only 725 rpm? Comanded afr does not equal actual afr. How did you tune the ve and maf tables?
    Cam specs are 222/224 .604/.604 on 112 lsa

    Idle rpm is 725 because it can idle at that just fine. Do you mean I should go lower?

    If you mean higher, what is the benefit to a higher idle for cold crank or anything else?

    AFR was determined with LM2 wideband, and Calc.VET was used for VE and MAF data. And i'm sure you know, MAF data doesn't have an effect on cold start, being that it is in open loop.
    Last edited by sac811; October 31st, 2013 at 01:51 PM.

  2. #12
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    Try adding fuel to B3201. Yours is all zero. Does the fuel pump prime when you turn the key on before you crank it?
    1997 S10, 06 trailblazer SS LS2 swap, 4L70E trans, 76mm turbo. Factory ZQ8 suspension. 3.08, G80 w/a zexel. With a 0411 swap.

  3. #13
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    my cam is 224/224 .567/.567 116 lsa and it needs an idle of 825 which then fluxes 800-850.

    Just because the car warm can idle down there doesn't mean its good or healthy for the car, I understand you want the rumble etc of the cam sound but having a stable idle is more important and healthier for the car.

    Put the idle like this:

    -40 1000 1000 1150 1150
    -28 1000 1000 1150 1150
    -16 1000 1000 1000 1000
    -4 975 975 1050 1050
    8 925 925 1050 1050
    20 900 900 975 975
    32 875 875 975 975
    44 800 800 900 900
    56 800 800 850 850
    68 800 800 825 825


    80-140 are the same as 68degrees C

    you can put them to 800 but i would recommend 825 for your cam

    I found my VE for idle 800 15(map) 1.0950 seems to make it pretty stable over all and i never have an issue with idle at any temp.

  4. #14
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    I dont have any issue with idle 2 seconds after I start it even when cold. I just have to give it a little gas then let it come down and it idles fine cold.

    I just want it to start right up withoit giving it gas on startup.

    Yes the fuel pimp primes every time on turning key to on position.

    But ill give these thjngs a shot.

    Thanks
    Last edited by sac811; November 1st, 2013 at 03:31 AM.

  5. #15
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    Quote Originally Posted by slows10 View Post
    Try adding fuel to B3201. Yours is all zero. Does the fuel pump prime when you turn the key on before you crank it?
    From all that I see, no stock files or modded files use anything other than 0 on table b3201

    Do you have any suggestions on what sort of data I should enter in this table?

    The pump does prime and has always primed and never had a problem starting and staying running right after until motor/cam swap. But figured that was normal.

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