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Old 08-29-2008, 07:30 AM   #1
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Question Is it possible to induce DFCO early?

My truck won't DFCO until after 8-10 seconds of engine braking. This makes it almost entirely useless unless you're descending a mountain or a LONG hill. Until it DFCOs, it uses far more fuel than idle. I was thinking that maybe I can fool it into thinking it's in DFCO conditions earlier, or otherwise trigger DFCO.

What sensor data is used for DFCO?

I'd guess TPS and RPM alone. I'm pretty sure it's a bad idea to monkey with either of those; RPM data is one of the main pieces of data used in fuel and nearly every other calculation, and TPS will probably throw a code.
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