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Thread: Rough idle on cold start up

  1. #11
    Join Date
    Jan 2010
    Location
    Brisbane, Australia
    Posts
    1,594

    Default

    I don't see anything "wrong" in your settings.
    Interesting that both temp sensors read about 70F higher than actual.
    Maybe a poor female at the module plug?
    Regards, Gary

  2. #12

    Default

    My guess is that my thermostat just went bad. All of my gauges and the controller are all reporting high temps so I don't think this is a sensor issue.

  3. #13

    Default

    Checked with my mechanic and the thermostat is brand new. Seems like an odd coincidence that it'd overheat for the first time right after the timing control was enabled.

  4. #14

    Default

    So I set the idle AFR to 11.5 again and the overheating issue is gone. I don't want to run this rich all the time though. Is there anything else I can do to counteract?

    I guess I slowly increase the Idle AFR to see at which point the overheating issue returns?

  5. #15
    msdtech1955 Guest

    Default

    email me a daytime phone number

    msdforms@msdperformance.com

  6. #16
    Join Date
    Jan 2010
    Location
    Brisbane, Australia
    Posts
    1,594

    Default

    I would be VERY concerned with a true ECT of 253F.

    Either the engine had timing way out to overheat like this, or coincidence that correct A/F and timing makes it overheat?
    Rich A/F of 11.5 cools it down, so what is done to the engine to bring up this scenario?
    Engine specs please?
    Regards, Gary

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