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Hey, glad to hear my suggestions had some positive effect. BTW, you're not looking for an "Air Flow" meter, you're looking for an "Air/fuel" meter, or more properly termed, a gas analyzer. A lot of people have had success using the O2 sensor approach, but by design, it has a different response than you would want to have for a meter transducer.
My take on the mixture/idle/lights thing is that it is a combination of feedback effects with the ECU (puzzle for you FI guys out there - what is the feedback loop in this system? don't forget, it has no O2 sensor? extra points if you can identify two loops), and power production at idle. Wrong mixture = lower idle HP = more RPM effect due to alternator drag.
It's not a voltage thing at the ECU. I've carefully monitored the line 16 and 24 voltage and there's no significant effect in switching on the lights.
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Brad Anders
Scottsdale, AZ
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