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Old 05-04-2006, 04:15 PM   #8
Freon
Scooby Specialist
 
Member#: 88322
Join Date: Jun 2005
Chapter/Region: MWSOC
Location: Indianapolis, IN
Vehicle:
2009 BMW 135i

Default

Use the code tags when you post logs. You need a wideband to tune fuel. You pretty much should have a wideband if you have a UTEC. I suggest this regardless.

Several of the knocks look like they occured right after a shift. I suggest putting in timing numbers into your 0% column from 4250rpm to 4750 and up. Just copying your 10% column over, maybe add 1-3 degrees. It really doesn't affect drivability much as long as you do it only at higher RPM. Basically you're jumping from +35 to +40 timing to +20-ish as you change between ECU and UTEC control, and that tends to cause 1 or 2 counts for many people. I really think this is something the OTS maps should do.

The log before "5th" looks like you may want to back timing off slightly in that RPM and load area. It could also be a lean spot, but again, without a wideband you don't know. Pick up an LM-1 or UEGO and a program called "MPS Logger", or get the TXS Tuner WB02.
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