VersaTune User Forum

So I've been logging stuff with vt, and I've found out that with whatever map I use (lean or rich or stock) both my Actual and Desirve AFRs are 15.1 to 15.4.

I've been messing around with stoich but I turned it back to stock a while ago.

Could it be dirty carbonized plugs? Or maybe carbonized o2 sensor?

You should see a change in the Actual AFR beyond 15.1 - 15.4 especially once you go into open loop.

Walle has posted a good write up / discussion you can see in this thread
viewtopic.php?f=25&t=4316

wcs wrote: ↑November 21st, 2023, 12:45 pm You should see a change in the Actual AFR beyond 15.1 - 15.4 especially once you go into open loop.

Walle has posted a good write up / discussion you can see in this thread
viewtopic.php?f=25&t=4316

Wow man, appreciate it. Thank you.

0124alexrx8 wrote: ↑November 22nd, 2023, 1:55 am Wow man, appreciate it. Thank you.

have you checked how much does the "Closed loop air fuel additive 1" differ at those cells of interest?

Walle wrote: ↑November 26th, 2023, 9:46 am have you checked how much does the "Closed loop air fuel additive 1" differ at those cells of interest?

Hey, sorry for answering this late, but yes, I did check everything mentioned, and I had no luck. I'm suspecting of a faulty upstream o2 sensor.

So after a good while, I fixed it. It was one of the vacuum hoses, actually, the one going to the SSV, it was cracked. I also suspected of a faulty precat gasket, and the same, it was all burnt and ripped, I changed that, changed the hoses and now it's all gucci.