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Thread: COS 5 Help Needed Here...Please

  1. #41
    Joe (Moderator) joecar's Avatar
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    Apr 2003
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    Good to hear it is converging

    Log the pid GM.TRQENG... it should be high when any significant load is applied... the trans pressure is calculated/looked up from calculated torque.

  2. #42
    Senior Member tatasta's Avatar
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    Mar 2009
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    Idle is alot better. Once the car is driven around, it runs great. After I park for a while and restart, I get alot of surging. Not sure what the problem is there. It seem to heat up a little under light loads (coasting). I think timing is a bit far advanced. It is running around 32-33* at 2000-2200 rpm and light load. I can fix that.
    As far as the trans goes, the TFMPRS is hitting 90 at high TPS. I think that is good. Any trans help would be appreciated.
    I have lost some boost. Max MAP on this run was ~127kpa vs the usual 135kpa. I need to go through and re-torque clamps and check drive belt tension.
    Anyway, any guidance would be great!!
    Thanks
    Bob
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