Does this tune look stock?

[samthejam]

Howdy,

This is the tune from my M3. We did CSL shift settings, deleted the 105 DTC, and top speed limiter.

I did not turn off the cat efficiency monitoring, that was tampered with prior to me. I looked at the tune, and I can't see any timing, fuel or vanos map changes when comparing to a stock .bin.

After I put headers on, no CEL and it's running fairly strong. No complaints at all with the tune.

I find it hard to believe someone just turned that off, and didn't change anything else.

I am familiar with using Tunerpro, I have done a lot of chip tuning for my E28, but this DME is a completely different animal so unsure of what else is generally messed with for tuning.

Am I missing something?

- Sam

[SliM3]

I can tell you right off the bat that your post cat o2's were coded out by changing the post-cat diag. resistance values. The DME monitors o2 sensor condition and proper connection by monitoring the resistance values of the heater circuit.