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- From: dave.williams@chaos.lrk.ar.us (Dave Williams)
- Newsgroups: rec.autos.tech
- Subject: BLOCK LEARN?
- Message-ID: <2377.88.uupcb@chaos.lrk.ar.us>
- Date: 15 Nov 92 14:48:00 GMT
- Reply-To: dave.williams@chaos.lrk.ar.us (Dave Williams)
- Organization: The Courts of Chaos * 501-985-0059 * Public Access Usenet
- Lines: 12
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- -> The 1991 Chevrolet Truck Emissions Manual (Helm) in the (Electronic
- ...
- -> How is the "block learn value" generated?
- -> How is it used by the ECM?
-
- The block learn value is the tweak factor the ECM uses to adjust for
- things like carbon buildup, crummy gas, clogged cat or air filter, etc.
- The GM block learn is flexible enough to adjust for different injectors,
- hotter cam (until you get enough overlap to freak the O2 sensor) and so
- forth. It's quite a nice system.
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