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Old 03-06-2008, 06:01 AM   #7 (permalink)
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1999 Saturn SW2 - '99 Saturn SW2 Wagon
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RH77 -

Originally Posted by RH77 View Post
Having installed an A/F ratio meter (with similar LEDs), I can say that's it nearly worthless.

This was on an '03 Evo -- the LEDs would be consistent only in open loop: cold start or full-throttle. The closest use was A/F at full-throttle, full-boost (in those driving situations, a quick glance) to see if a lean situation was apparent (rare if ever).

Otherwise, the meter bounced back and forth under normal operation.
I have a digital A/F meter that shows me the magic 14.7 number. I got it because I wanted to "see" what an EFIE (02 sensor signal modifier) would do. But, when the EFIE is off, the A/F ratio is pretty much bouncing above and below 14.7, so it's not doing much, just like you said.


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