Nissan 370Z Forum - AFR difference between the banks

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Nissan 370Z Forum (http://www.the370z.com/)

- Tuning (http://www.the370z.com/tuning/)

- - AFR difference between the banks (http://www.the370z.com/tuning/88113-afr-difference-between-banks.html)

ihiryu

11-09-2016 10:56 AM

https://s16.postimg.org/c0u7qolb5/cylinder.png

flashgordon

11-09-2016 01:10 PM

Quote:

Originally Posted by ihiryu (Post 3576198)

https://s16.postimg.org/c0u7qolb5/cylinder.png

....mmh! I know.... :tiphat::tiphat:

My question is:

If you have an AFR balanced on the entire range, but only around 1800-3600RPM Bank1 differs from bank2....

What do you do? ....disconnecting O2s (The lambda after the cats) is the solution?

ihiryu

11-09-2016 05:54 PM

Hmm that is strange.

Here's a silly question, but is your MAF voltages during that area? Wonder if it's possible that the MAF's are reading slightly different from one another?

flashgordon

11-10-2016 05:19 AM

Quote:

Originally Posted by ihiryu (Post 3576333)

Hmm that is strange.

Here's a silly question, but is your MAF voltages during that area? Wonder if it's possible that the MAF's are reading slightly different from one another?

Interesting!

....this weekend I can try to swap the 2 sensors....

ihiryu

11-10-2016 11:32 AM

Try it and report if the AFR dip changes between the banks.

I would also double check to make sure you don't have any vacuum/air leaks post MAF. I would imagine a vacuum leak on a MAF based system could make things run funny.

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