RomRaider

Hi everyone, I've been tuning the MS41 for a while now. I want to keep the O2 sensor running, but I don't know how to access and tune the target lambda table. Can anyone help me? How can I access the target lambda table? Thanks.

as there's no wideband o2, ecu targets 14.7 in closed loop
once on open loop there's enrichment table,

or you can just go ms41.3 route wide wideband o2

I've tried it in many cars. What you say is true, but above 4,000 rpm and at full throttle, the AFR is around 13.

I know there's a Lambda target table. I don't understand why the developers didn't add it to the definition file

I was wondering the same thing. I was previously using RomRaider with MS 41.1. The AFR target table isn't shown, and I see no way to adjust it. Most comments in the forums say the stock map targets 14.7 everywhere. I don't think this is the case. I recall seeing an AFR target of 13.95 when logging under 41.1.

I recently upgraded to MS 41.3 on a completely stock engine to prep for my WBO2 installed. With the AFR maps now accessible I did some testing. Setting that map to 14.7 everywhere. Resulted in the car tuning itself to run 14.7 at all loads. Accelleration was poor due to the ECU tuning out the enrichment at higher loads.

Even without a wideband installed or narrowband emulation active, the ECU will target the AFR shown under WBO2. I changed the AFR map and found that it was being used even without the wideband stuff enabled. The result was much improved acceleration in closed loop. I was running full time closed loop with the OEM narrowband sensor with an updated AFR map with reasonable targets. The results were better the me trying to log and manually update the 20x20 fuel map. I considered not installing the WBO2 and keeping the car in 2 channel mode. I added a Spartan 3 Lite V2 and the LSU ADV sensor. I'm glad I did because the car runs much better and I can get accurate corrections done by the ECU very quickly. Currently 179K on my car and the oxygen sensors look original to me. They still work, but it appears they have lost their accuracy.

Another thing I've tried is changing the Closed Loop - Rich vs Lean Voltage Hysteresis. Dropping the voltage will make the LTFT trims adjust quick. I tried 0.48, but the LTFT move too fast at that level. l set mine at 0.92 and it seems to be an OK and I noticed the LTFT adjusting faster. Still toying with if I even want the LTFT adjusting the entire map while I'm still trying get the map's STFT's to under -/+ 5%