Thread: No DFCO?
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Old 01-20-2012, 07:44 AM   #1 (permalink)
Kodak
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Join Date: Feb 2011
Location: USA
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Canyon - '07 GMC Canyon 2wd regular cab
90 day: 24.95 mpg (US)
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No DFCO?

I've been operating under the assumption that my pickup probably has the fuel cutoff feature. I was never sure of the exact rpm at which it kicked in, but I assumed it was a little under 2k somewhere, and I thought I felt a little bump at 1800.

Now that I have the SG-e I can find out for sure. Well, I took 2nd gear out to a little over 3k rpm, started engine braking, and expected the gauge to read 9999 to indicate cutoff. The gauge read pretty high, like in the low 100's, but it did not appear to cut fuel. In fact, coasting in neutral versus coasting in gear appears to net better FE.

Did I not rev high enough to reach DFCO, or am I reading the gauge incorrectly? I used the instant mpg feature. For the record, I certainly did have my foot entirely off the throttle, and the engine speed in the low 3,000s.

Thanks for any insight.

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