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I have been wondering about my AFR for some time now in part blaming it for my difficulty passing smog last time. Well Smog is due again and I decided to properly fix all parts of the system. From what I have been reading on an AFR that is not proper for the vehicle can cause smog issues.
On top of that since I have aftermarket higher flow rate injectors installed I have always questioned if my educated guess on 10 clicks lean to the AFM is good enough. I used the OBD ports some time ago to see what the vehicles 02 sensor is doing/seeing but to be honest I didn't leave that test with any real confidence that everything is good.
Found a good deal on a good enough AFR kit and here I am
The bung Hole drilled, bung welded, wideband 02 sensor from AFR kit installed The PLX for the AFR kit. Plugged in is a bluetooth chip. Outputs information to my phone. Motorcycle battery for power supply.
NOW, this is where I need the help of this forum. I have been reading around, including the autoshop101 documents (which I was not able to find the right pages specifically talking about what the AFR should be under various conditions). I have an idea of what AFR is expected under what load conditions. But, there is a bit of back and forth in the forums and I just didn't feel I was sure about it all. So, I recorded the test runs I did. I am sharing the links to the videos below with the conditions of the car's setup. I first varied the timing advance, as I had it set to 14 Deg BTC for some time. I read that retarding helps pass smog as well. Then I started manually adjusting the AFM and seeing the affects of it in the AFR gauge during the test drives.
I have some commentary in the videos noting how much acceleration there is and such.
What I am asking is for you guys to give me your thoughts on which runs are showing proper AFR's.
Video one. 14 deg BTC. About 10 clicks lean on AFM
Just want to add, since I know people will tell me to go check this and that for smog issues, that this is just step one on my work towards easy pass smog life
This is step one because it is the most interesting and I was excited to use the AFR kit
step 2 is re-checking the EGR system. My last check was inconclusive...?
Sep 22, 2019 | 08:56 AM
