Quote:
Originally Posted by hertfordnc
This may be a Cummins-specific question, The computer always provides enough fuel to keep it from stalling.
It idles at 700 RPM but when i am rolling along in 4th gear with my foot off the throttle it is turning around 1000 rpms. So it's burniong more fuel that it would idling at a stop.
The question is, does it burn more or less fuel than it would in a lower gear at a proper RPM?
Peak efficiency for this engine is around 1600 (peak torque)
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Sounds like you should do some testing!! I don't know the details of the truck, but can you get some instrumentation to do some testing?