[Gmecm] RE: VSS help needed

[Andrew Gibson]

Here's the skinny on fuel enleanment (or shutoff depending on the model) This applies to almost everything fuel injected.

Throttle closed, engine rpm over specified threshold (usually 1400 rpm) fuel injectors shut off. That's it. Pretty simple huh? On OBDII it is listed as being Open Loop Fuel Cutoff if you look at the open/closed loop data in the datastream. No VSS is needed.

The VSS is needed to run the stall saver program which opens the IAC all the way so the engine will not stall during a sudden stop.

 
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