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XfireZ51 · 12-30-2017

Sorry Marty, but there’s no way GM would allow the car to run at anything below the point where the ECM is not LEARNING and modifying the fueling for BLMs. No matter what the conditions. That’s part of what cold weather testing is all about.
The coolant needs to be at >80C for that. Anything below that for other than warmup is not what the calibration is looking for. That doesn’t mean it won’t run but it defeats the whole point of Closed Loop operation.

12-30-2017	#395
XfireZ51 Join Date: May 2007 Location: Chicagoland, IL Posts: 9,686	Re: TB removal and then some!!! Sorry Marty, but there’s no way GM would allow the car to run at anything below the point where the ECM is not LEARNING and modifying the fueling for BLMs. No matter what the conditions. That’s part of what cold weather testing is all about. The coolant needs to be at >80C for that. Anything below that for other than warmup is not what the calibration is looking for. That doesn’t mean it won’t run but it defeats the whole point of Closed Loop operation.