AFR difference between the banks

Mitco39 · 07-08-2014, 11:18 AM

To anyone following this thread unplugging the O2s fixed the trim issue. The car is now doing a much better job at meeting its targets. Haven't had extensive time on it yet, but it does seem to be much better.

Jordo! · 10-15-2014, 01:48 AM

Quote:

Originally Posted by Mitco39

To anyone following this thread unplugging the O2s fixed the trim issue. The car is now doing a much better job at meeting its targets. Haven't had extensive time on it yet, but it does seem to be much better.

unplugged the secondary or the primary -- I'm guessing the former?

Mitco39 · 10-15-2014, 08:39 AM

Quote:

Originally Posted by gendr777

Not sure if this issue is still circulating about the forum. I was having the same issue. Bank 1 and bank 2 were always off by 0.5-0.7. An accidental wipe of my rom file lead me to this series of adjustments which virtually eliminated the disparity.

1) I downloaded a different rom from uprev by accident. I flashed the 2013 370 NISMO file 1A40D instead of the one my ecu was supposed to match:1A39D.

2) I began running all uprev programs as administrator.

3) I edged up my injector latency value at 14V a bit (added 0.3ms).

That's it. Like the majority of useful medications on the market, this was a serendipitous discovery. I hope this helps at least one other person.

Peace.
-JMC

Your point 3 might be the reason you're not seeing this happen anymore. Are both your secondary O2s on the same bank?

Quote:

Originally Posted by Jordo!

unplugged the secondary or the primary -- I'm guessing the former?

Secondary, they been unplugged all summer with 0 issues.

jwick · 10-15-2014, 09:01 AM

Quote:

Originally Posted by Mitco39

Your point 3 might be the reason you're not seeing this happen anymore. Are both your secondary O2s on the same bank?

Secondary, they been unplugged all summer with 0 issues.

This is on my todo list for the V1.75 upgrade. Bought the plugs to be able to pull them completely!

Mitco39 · 10-15-2014, 09:27 AM

Quote:

Originally Posted by jwick

This is on my todo list for the V1.75 upgrade. Bought the plugs to be able to pull them completely!

yeah.... i been lazy...

07-08-2014, 11:18 AM	#1 (permalink)
Mitco39 A True Z Fanatic Join Date: Aug 2012 Location: Edmonton Alberta Canada Posts: 2,089 Drives: 40th 370z Rep Power: 134	To anyone following this thread unplugging the O2s fixed the trim issue. The car is now doing a much better job at meeting its targets. Haven't had extensive time on it yet, but it does seem to be much better. __________________ 2007 Chevy Duramax - EFILive Tuned By Me 2010 40th W/ Nav - Boosted Performance - UpRev Tuned By Me The Mrs. Ride -2012 335XI N55 BMW - Cobb Tuned By Me, Built by her My Build --> http://www.the370z.com/members-370z-...39s-build.html

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