Nissan 370Z Forum  

AFR difference between the banks

Originally Posted by Jordo! Hmm. So that doesn't affect the detection logic, it just turns off the CEL... that's probably randomly screwing with things for a lot of folks Having

Go Back   Nissan 370Z Forum > Nissan 370Z Tech Area > Engine & Drivetrain > Tuning


Like Tree7Likes

 
 
LinkBack Thread Tools Display Modes
Prev Previous Post   Next Post Next
Old 07-04-2014, 09:05 PM   #22 (permalink)
A True Z Fanatic
 
Mitco39's Avatar
 
Join Date: Aug 2012
Location: Edmonton Alberta Canada
Posts: 2,089
Drives: 40th 370z
Rep Power: 132
Mitco39 has a reputation beyond reputeMitco39 has a reputation beyond reputeMitco39 has a reputation beyond reputeMitco39 has a reputation beyond reputeMitco39 has a reputation beyond reputeMitco39 has a reputation beyond reputeMitco39 has a reputation beyond reputeMitco39 has a reputation beyond reputeMitco39 has a reputation beyond reputeMitco39 has a reputation beyond reputeMitco39 has a reputation beyond repute
Default

Quote:
Originally Posted by Jordo! View Post
Hmm. So that doesn't affect the detection logic, it just turns off the CEL... that's probably randomly screwing with things for a lot of folks

Having the two O2's on one bank sounds like it very well might be the problem! Actually, if they are located on the same downpipe, one after the other rather than on separate but parallel paths, they are probably reading latency in voltage change from the primaries quite differently, and that could result in wonky corrections being applied.

One more thought if it isn't the O2's: Are you using bigger injectors? The k multiplier (I can't recall if that scales for size, injector latency or both) might need to be tweaked if it was left at stock values.
Jordo, thats how it is in a bunch of other ECUs I've played with. I would expect this one to be no different. I have not tested out that fact but I would be very surprised if this one did something other than the Bosche/Delphi ECUs I have played with.

The double O2's could most definitely be the issue and right now thats the next thing I am going to do (been a bit busy as of late so I haven't played with the car at all as of yet.

I do have larger injectors and the K multiplier was changed accordingly. Even if that wasn't dialed in properly you would just see that in the correction factors as well as at WOT you would go lean or rich depending on how far out your K factor is. Essentially any of those changes will absolutely affect the AFRs but under closed loop the computer will do its best to account for any errors in the tune itself and if your to far out you will get lean or rich bank codes.

Tomorrow I am installing CJMs fuel return system which will warrant a full redo of the fuel tables so I will be playing with UpRev alot then. As I type this I am soldering together my own device for listening to the knock sensor with headphones that they have posted on their website.

GaleForce likes this.
__________________
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
Mitco39 is offline   Reply With Quote
 

Bookmarks


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
AFR's off between banks HELP! 12nismo Engine & Drivetrain 10 09-18-2013 08:50 PM
FI TDX Gen 1 and Gen 2 Difference 7sinz Intake/Exhaust 6 05-12-2013 10:10 PM
BBQ Spanish Banks Sunday July 22nd Sena Canada 76 07-24-2012 11:16 PM
Difference between PG and GM? Noc Exterior & Interior 5 04-15-2011 05:25 PM
Difference between 09 and 10 SkyZ Nissan 370Z General Discussions 32 03-27-2010 12:03 PM


All times are GMT -5. The time now is 06:28 PM.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.0 PL2