Quote:
Originally Posted by RobertSmalls
Most modern cars do DFCO - they turn off the fuel injectors when you're above a certain RPM with your foot off the throttle. So in my Subaru, the engine braking is 100% as effective whether the key is on or off. You should EOC when you want to conserve momentum, and DFCO when you don't want your momentum.
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The question there is at what RPM do they begin DFCO?
Not all cars do it at such low RPMS as we like to use, and some engage it at higher RPMs, and then let it stay in DFCO until you're at a pre-determined lower RPM.
For example, DFCO may not start until you're at 2300, but may not turn the fuel back on until you're down to 1100, or you hit the accelerator, whichever comes first.
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