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Thread: 330hp vortec crate motor timing issues

  1. #21
    Member Age08's Avatar
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    I finally figured out the issue, it all came down to intake air temp, the intake was getting hot from the exhaust and heat soaking the sensor. after relocating the sensor out side of the engine bay as a test not more timing retard,
    Now a new CAI and some header rap should do the trick.

  2. #22
    Lifetime Member EagleMark's Avatar
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    It's supposed to pull timing and adjust fuel with IAT temps.

    Yes means the PCM will blend IAT and ECT to determine the charge temperature of the air entering the cylinder, used in VE calculations.
    No means the PCM will use the IAT exclusively as the charge temperature.
    The blend weighting between IAT and ECT is determined by {B4901} "Charge Temperature Blending".
    B5911 Spark IAT table: Provides intake air temperature correction to spark timing.
    Be careful, watch for knock...

  3. #23
    Member Age08's Avatar
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    Oh I know, I am going to be correcting the problem properly, I was just confirming that it was just only the IAT sensor which it was,

  4. #24
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    Yay, does she run better now? I was wondering what was going on.

    Glad you got it figured out.

    peace
    Hog
    1997 rcsb stock L31 longblock, Marine Intake with 28# EV6 injectors, L35 2700 stall TC,Hooker LT's 2.007 60ft

  5. #25
    Member Age08's Avatar
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    Yea, it has decent power when the intake is cold, a true cai should fix the problem.

    Now I just have to tune the idle and I'm done,

    Adrian

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