Quote:
Originally Posted by apgrok1
They still inject a small amount to keep the engine running, even on deceleration. My proof? If they did shut off, the effect would be exactly the same as turning the key off in gear.
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My shop manual states:
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Fuel Cut-off Control
*During deceleration with the throttle valve closed, current to the fuel injectors is cut off to improve fuel economy at speeds over following rpm:
- B18B1 engine: 970 rpm (Canada model: 1050 rpm) My Engine -- U.S. Version
- B18C1 engine: 970 rpm (Canada model: 1050 rpm)
- B18C5 engine: 1300 rpm (Canada model: 1400 rpm)
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2 years ago, I rigged up an injection deactivation device. On decel above 950 rpm or so, there was no difference in engine operation.
RH77
EDIT: Adding...
So, then the engine is still operational providing power from the alternator, and all other ECU-controlled functions. The resistance between the compression of the engine and the turning transmission may be a point for wear if IGEOC (in-gear engine-off coast)...