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Old 03-24-2014, 03:54 PM   #4 (permalink)
Master EcoModder
Join Date: May 2012
Location: Tampa, FL
Posts: 1,554

Volt, gas only - '12 Chevrolet Volt Premium
90 day: 38.02 mpg (US)

Volt, electric only - '12 Chevrolet Volt Premium
90 day: 132.26 mpg (US)

Yukon Denali Hybrid - '12 GMC Yukon Denali Hybrid
90 day: 21.48 mpg (US)
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data logging will be your friend, possibly a dying sensor.

I had an issue with a egr valve that was slow to close causing the engine to die when you let off the throttle, only way i found the problem was seeing log data of the IAT sensor reading a 100 degree change in under 10 seconds.

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