My s appears to be running extremely rich on 10psi, ID1000 injectors, but the data says otherwise. The exhaust system and o2 sensor are completely black, and there is a black mist that forms on the rear after driving a couple times. I would appreciate any input regarding my fuel map. Is it possible it is ignition related? I attached below my current fuel + ignition

map on AEM Series 2 and a log of AFR vs engine load. Thanks all

 

Send me a CSV file that includes RPM, MAP and AFR.

I cant take a look on my histrogram reader.

Fundamentally it's your fuel tuning.

 

Attached is the csv, thank you for your help

 

I told you to email me but then converted it to CSV myself - so no need. Confirming that you are running more rich than normal at idle (and probably at startup for too long) and really everywhere else as well tbh.

Not a huge-huge deal as long as you are changing your oil often but probably unpleasant smell, messy and just wasteful tbh.

Running that rich probably helps with a nice and smooth idle - not that I'd ever do that tho. At least all looks safe TBH.




What parameters are you capturing? Send me everything. Email it to me obv in CSV and we can take a look at it together.

 

Looked at your other logs.

Confirming you are about a point+ too rich in your low RPM and especially your idle area. Should 14.7 but you're at 12.6 - 13.45 AFR.

Are you running LAMBDA feedback?

 

I am running O2FB. Attached is the target table. Is it possible it is not fuel but oil coming out of my exhaust? Is it really so rich that carbon deposits are forming on my bumper?

 

Everything is possible if you have bad rings but yes based on your logs, LAMBDA target aside, you're a point off for whatever reason.

On your laptop just see if LAMBDA FB is 0 or a 1 (also see how much it's correcting +/- X%) to confirm it's actually working at idle and cruise.

Either way, a point off, plus cold starts will cause soot on a bumper. Running rich at WOT will do the same. No cat will also add to it, etc etc.

All we know for sure is your AFR is not in line with your target. Other things are just speculations.

 

So I am 1 AFR too rich across the whole map, just looking at the log, not the target afr map? I don’t care about the target map right now, I just want to know where i should be in terms of what the o2 sensor is seeing.

 

Look at the histogram. It's between your 850-1250RPMs. This could be your soot problem that accumulates over time - obviously in addition to the WOT runs. But if you're idling in 13s AFR then that's what I'd fix and try to get it to stoich.

I wouldn't sweat other stuff even if it doesn't align with the target map. Seems more than safe and fine to me.

 

i think I have an o2 sensor problem because you can see black smoke at 4K rpm. If you are behind it your eyes will water because of the richness even above 2k rpm.