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Thread: DFCO after enrichment

  1. #1
    Carb and Points!
    Join Date
    Apr 2022
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    4

    DFCO after enrichment

    Has anyone came across a parameter for enrichment after dfco or anything similar on the gen 3 gm pcms? Drives me nuts to hit dfco thinking im saving fuel and get the .88-.93 lambda for a few seconds after the engine fires back up.

  2. #2
    LT1 specialist steveo's Avatar
    Join Date
    Aug 2013
    Posts
    4,041
    its pretty normal to need some enrichment at the exit point or you will feel it. going immediately back to stoich results in a hiccup
    but if you have 2 seconds of no fuel then 2 seconds of like 10% more fuel, well......do the math yourself

  3. #3
    Carb and Points!
    Join Date
    Apr 2022
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    4
    I had thought about the transition back to stoich but i do like a experiment. I figure it may result in a small count of misfires.

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