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> sooo lean....why??
NOMIEZVR4
post Apr 8 2003, 07:41 PM
Post #1


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i have a logger and my car has always run realll lean and i still havent figured out why. i have a 90 laser with mods in sig, my cat is on right now and my dump is not on the car. my maf is not hacked at all. my fp is not rewired or anything. i need some suggestions as to why my car is running lean. im running 12-13lbs of boost. my logger displays the following:

fuel trim lo 118%
mid 94%
hi 116%
02 volt at WOT .92-.94
timing at WOT 11 degrees(why so low??)
knock maximum 30+ (in 2nd gear around 5k rpms)

if there is anymore info that you need, please ask, i need suggestions, also i run 93 octane.
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natedogg
post Apr 9 2003, 07:50 AM
Post #2


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Well, your closed-loop trims aren't bad. But you really cant tune by those because once the car goes WOT the ECU switches to open-loop and the trims are ignored by the ECU. You don't seem to me running all that lean to me, but you are running some high knock counts. Go ahead and rewire the fuel pump. That may bring your knock counts down a bit. BTW, your mods never showed up in your sig.
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