Well, when I took the car to be 'tuned', the mechanic found that the previous owner had messed with the AFM and truned it 8 TURNS in the wrong direction to make it run rich, and that is when my exhaust was black and I got about 8MPG all the time. He said he fixed it, and used his diagnostic tools to figure out the right A/F mixture. However, I have fixed many things since then (back in April of 2000), like cleaning my throttle and my vacuum lines and AAV etc. etc. ... So to improve my milage, I wanted to lean out my mixture further. I turned it about 4 teeth clockwise yesterday, and didn't notice any changes in idle or revving rpms or power, so I think i need to go even further. I don't see how one tooth is giving you such drastic resluts.
Another interpretation is that my AFM could be still way too loose for a few teeth to make a big difference, all the more reason for me to tighten it up even further.
What do you think???
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Lock Stock '84 944 and two smokin' tires ...
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