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XfireZ51 · 05-30-2014

ECM doesn't go Closed Loop/Learn mode till 81C or 178F. So you pretty much lose any fuel trim from the O2 sensors. The motor is really designed to run better at a warmer temp than 160F.

05-30-2014	#6
XfireZ51 Join Date: May 2007 Location: Chicagoland, IL Posts: 9,686	Re: Why not just remove thermostat? ECM doesn't go Closed Loop/Learn mode till 81C or 178F. So you pretty much lose any fuel trim from the O2 sensors. The motor is really designed to run better at a warmer temp than 160F.