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View Full Version : DFCO after enrichment



04silverado6.0
09-02-2023, 06:03 AM
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.

steveo
09-03-2023, 10:00 PM
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

04silverado6.0
09-04-2023, 04:45 AM
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.