So I have been working on getting the trims closer and closer. My low is at +1.1 and my mid is -0.8. There seems to be one problem though. While idling for long periods of time, the fan kicks on, load is increased, and the injector pulse with jumps just a little bit (+2 or so)

This jump in the pulse width bumps the short trim up and then as a result the idle trim dives down -8%. After the fan stops the injector pulse width goes back to normal and the low trims out to near zero again.

My question is are other people experiencing this?
Is this within acceptable deviation or is this indicative of a larger issue?

 

Plus Minus 10 is fine ECU trims the car non stop.

 

Alright. Just noticed other people were shooting for +/-3% on here. It doesn't seem to max out at all and AFR's look good. Just wanted to make sure that this is acceptable and expected.

Thanks for the response.