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Old 06-26-2020, 08:25 AM   #21 (permalink)
EcoModding Lurker
Join Date: Jun 2010
Location: Edinburg, VA
Posts: 74

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 Gasoline Fumes View Post
What about modifying the TPS and/or MAP signals to hide the true load from the ECU?
Interesting idea! I'm pretty sure that on the Metro the closed/open loop threshold, once operating conditions for closed loop are met, is based 100% on TPS position vs. RPM (as it is on the Caprice and other ECUs that I'm familiar with). So, it's very likely that the only signal that would need modification is the TPS signal.

The question is: how would so doing affect the engine's operation in other ways?

Ultimately, it would be more about convenience than necessity. It is possible to keep it in closed loop at high load--you just have to be very careful about throttling.



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