I heard a rumor that the 2200 leans out while the rpms are dropping. Can anybody actually confirm this or is it not true?
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Isn't it called decelleration de-enrichment or something like that? I think if you check out the tuning fourm, there is a fule and/or spark map for decelleration.
it is normal, and probably won't hurt anything if thats what your worried about. my old boosted 2200 would run rich under boost, then let off and run 17:1 afr while the rpms drop...car ran strong for a long time until the starter went out
not all of the GM's had DCOE enabled from the factory, it was sort of a mix and match thing, certain cars got it and others didn't. I believe most of the manuals got it though. Its also a very good fuel saving feature.
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** Flat Broke Racing Inc.**
Shifted wrote:Its called DFCO and all J's at least from 97 up had it. Deceleration Fuel Cut Off.
Ah yes, that's what I was shooting for; I couldn't remember the terminology
except i was running MS

, which also has it though