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Old 11-05-2015, 10:25 PM   #45 (permalink)
98civHX
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Quote:
Originally Posted by darcane View Post
Lean burn will make your Ultragauge read a little low on the mpg readout. It's close enough, that I don't worry about the discrepancy too much. While calibrating the gauge, I try to keep out of lean burn as much as possible.

On my '01, I have the Ultragauge monitor the second O2 sensor. When lean burn engages, the O2 sensor reports 0.000. You should be able to detect a very subtle stumble as it enters lean mode and has a slight reduction in power. When it disengages, you should feel a similarly subtle lurch.
Alright, thanks! I'll look at the o2 sensor along with the tps and %engine load when I try to learn how to get into lean burn.
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