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Apr 1, 2010 | 10:33 PM

#11

GMCtrk

TECH Senior Member

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From: Dallas

Quote:

Originally Posted by Atomic

This.

I also dont ever use long term fuel trims. My tune is close enough that I dont need them, and they only make things more complicated for me.

In other words you run open loop. I like open loop, I'm just concerned how off my fueling will become with changing weather conditions.

Apr 1, 2010 | 10:39 PM

#12

Atomic

I have a gauge for that

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From: Huntsville, AL

No, i run closed loop. There are short term trims and long term. The long terms are basically an average of short term trims. They are useful when there are big trim values, but my tune is close enough where the short term trims are plenty to keep my AFR in line.