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Thread: Low timing at startup, probably Catalyst heating

  1. #1
    Tuner
    Join Date
    May 2016
    Location
    Denver, North Carolina
    Posts
    121

    Low timing at startup, probably Catalyst heating

    I have been trying to come up with a way to keep ignition timing from running very low, even negative, for a period of time after startup. I've seen it in every Hemi. I know that it is used for catalyst heating, but obviously there are times where this is not relevant. I've tried all types of different changes with no change on a lot of different vehicles. I've asked HP to add some tables to help with this, but so far the tables they have added do not seem to be helping. Anyone have any ideas/thoughts on this?

  2. #2
    Advanced Tuner
    Join Date
    Nov 2017
    Posts
    523
    What have you tried so far?
    Are the vehicles in question for off-road use without catalysts?

    Have you played with the electronic throttle flow tables?

  3. #3
    Have you tried [ECM] 44679 - Spark Minimum? You might be able to use this table to "cap" the minimum timing advance values.