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Originally Posted by DriveFast99
so guys, i have a quick question.
i was doing a little fine tuning and wondering how lean we can or should go while cruising? i was thinking 15.5-15.7 on the highway doing like 80 in 6th gear. anybody agree or disagree with this number? do you think i'll experience bucking? i really wanna get my hwy mpg up to like 25+ and my city around 20. right now im at like 21hwy and 17city.
any help would be appreciated.
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Unless you have the O2 sensors disconnected the ECU is going to try to put the fuel back to 14.7 by maxing the trims, which will mess up your driveabililty.
If you have the sensors unplugged, then 16.2 is a good target. I got 25 mpg in my GN (not stock...) at 70 mph, with the A/C on. I was running about 16.2
I had some occaisional bucking, but the plug wires are about shot...
B