Apparently, and as far as I can tell, Mazda has not discovered

running

it lean

like Tracy does or running it lean affects the emissions

unfavorably.

Paul Lamar

My '86 never runs lean. It runs stoich in feedback mode at low rpm

and

rich best power at high rpm. My airplane does as well since it's the
same ECU. I'll be implementing that AFS trick soon though to allow

lean

operation.

Perry

Perry, what is the AFS trick?  I guess I wasn't paying attention that
day!
Ken Powell

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