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Thread: Startup issue

  1. 03-25-2021 #1
    arbracam26
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    Startup issue

    Hi,
    I have a startup issue. While cranking, engine remains a few seconds 2500 rpm and returns to idle speed. When I reset pcm memory ( 11 fuse in engine compartment), startup goes only a few times normally again .
    My car is a 05 300C 5.7 hemi with 6.1 hemi heads and intake manifold, dynatech with cat long tube headers, comp cams xfi 273h and 550CC injectors. The car run only E85.
    somebody could help me?
    Sorry for my bad english, I'm french...lol
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  2. 03-25-2021 #2
    GaS Engines
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    Your IAT was 127* on start up, but I dont see any idle adders for IAT temp, noticed your MAP pressure is rather high as well (might be from the 6.1L heads/Cam). Try dropping your Idle-RPM-Maximum Setpoint to 1500-1600 RPM. May also need to adjust VE tables in Idle area for proper startup idle speed.
    2013 Charger R/T - 1-3/4'' Longtubes, Catless Mids, 180 T-Stat, CAI, 6.4 Manifold Swap, 370whp@5600/411wtq@3950
    Contact [email protected] for Engine Building or Tuning needs!
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  3. 03-25-2021 #3
    arbracam26
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    Thanks! But how I can modify IAT adder? I only have one line in this table?
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  4. 03-25-2021 #4
    GaS Engines
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    You can change the IAT Axis, but that will only add idle RPM you can't make that table take away RPM.
    2013 Charger R/T - 1-3/4'' Longtubes, Catless Mids, 180 T-Stat, CAI, 6.4 Manifold Swap, 370whp@5600/411wtq@3950
    Contact [email protected] for Engine Building or Tuning needs!
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  5. 03-26-2021 #5
    arbracam26
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    I solved issue by setting idle rpm maximum setpoint to 1800 rpm and reduce minimum startup airflow. Thanks!!
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  6. 03-26-2021 #6
    GaS Engines
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    Glad i could help!
    2013 Charger R/T - 1-3/4'' Longtubes, Catless Mids, 180 T-Stat, CAI, 6.4 Manifold Swap, 370whp@5600/411wtq@3950
    Contact [email protected] for Engine Building or Tuning needs!
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