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Old 06-23-2021, 11:13 AM   #319 (permalink)
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Join Date: Jun 2010
Location: Edinburg, VA
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The Little Car - '00 Chevrolet Metro
90 day: 91.08 mpg (US)

The Big Car - '94 Chevrolet Caprice Wagon
90 day: 44.9 mpg (US)
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Originally Posted by serialk11r View Post
Have you retuned the ECU to get closed loop immediately when it's turned on? I think 5 seconds is the typical closed loop delay on a warm engine. I have my car set to 3 seconds down from 5 stock at 200F coolant temp, and 5 seconds at 180F coolant temp down from 8, and my open loop map is leaned out a little.
I use a kill switch to turn the engine "off," instead of the ignition switch. So the ECU stays on, and the engines on our cars immediately go into closed loop after a bump start or key start when they're warmed up.


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