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Old 09-26-2003, 12:21 PM   #1 (permalink)
turbo95dsm
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Registered: Sep 2003
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1G-specific Fuel Trim and o2 trim questions. Please help...

Ok. First I have done a search and found some stuff that helped me a bit but not enough.

I'm needing some help understanding my logs a little cause I dont fully understand the datalogger with fuel trims and o2 trims.

How does the o2 trim relate to the fuel trims?


Let me also say, I have tons of black smoke coming out my exhaust and I can smell the unburnt fuel and it leaves a fuel taste in my mouth... I'd think I was running very pig rich, but it seems from what I've read on this board that I am running a bit more on the lean side??

Here is a sample of some data from a log of my 93 Tsi Awd:
**(3rd gear pull @ 12 psi on pump gas)

EGT's are never above 780-800c

Fuel trims: (these never change no matter if idle or WOT)
High - 108
Mid - 102
Low - 96

O2 at WOT: .86 to .88

injector pulse - 12.54
injector duty cycle at WOT: ranges from 22 to 58

timing is in the mid 20's

My mods are:
PTE 54trim, 680cc injectors, 2g maf, 4" FP MAF to turbo intake, SAFC, FMIC walbrah 255, rre 3" dp, ATR 3" catback, 3" cat, + tranny stuff



Any help would be wonderful... Thanks in advance.


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93 TSI AWD
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