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Thread: Cold start question and help please....

  1. #1
    Advanced Tuner
    Join Date
    Jun 2011
    Location
    Montreal, Canada
    Posts
    758

    Cold start question and help please....

    I am not understanding the sequence of events at cold start. My commanded lambda is .97 as it should be until my coolant temp reaches 102, at which point commanded changes to 1.00. This part I understand and can see the reasoning in the tune.
    What I cant figure out is... when I start the car cold, and the commanded is .97, the trims are working and bring the actual too 1.00. I thought in open look the trims dont work. I want it to run a bit richer on cold start, (at what is commanded). What am I missing ?
    2007 Corvette C6 Vert. A6
    LME LS402, Pat G custom cam, ATI 10% OD Damper
    Circle D triple disc 2600, 3.42 Diff
    YSI, 3.0 pulley, ID 1000's
    Alky Control Meth,
    ARH 1 7/8 headers,
    1009 RWHP @ 7000, 817 RWT @ 6000

  2. #2
    Advanced Tuner
    Join Date
    Jun 2011
    Location
    Montreal, Canada
    Posts
    758
    Anyone ?
    2007 Corvette C6 Vert. A6
    LME LS402, Pat G custom cam, ATI 10% OD Damper
    Circle D triple disc 2600, 3.42 Diff
    YSI, 3.0 pulley, ID 1000's
    Alky Control Meth,
    ARH 1 7/8 headers,
    1009 RWHP @ 7000, 817 RWT @ 6000

  3. #3
    Tuner in Training
    Join Date
    Aug 2011
    Posts
    30
    Nope, I don't do anything in Lambda (I'm too stupid for that) free bump for yah though
    2008 Corvette C6 A6
    E force 599HP kit, 3.25 pulley
    ZR1 Cam, ATI Balancer
    160 stat, Dewitts Radiator
    LG 1 7/8 Superpros, delete cats, xpipe
    Century Built 6l80e, Ext. Transmission Cooler
    3200 Yank
    2.73 rear

  4. #4
    Senior Tuner Iam Broke's Avatar
    Join Date
    Jul 2009
    Posts
    2,305
    I see the same thing on mine. Not where I can look now but there is a table that let's it go into closed loop (stoich) after a give amount of time.