Reply to thread

I thought the closed loop setting kept the mixture at a very lean, Euro 4 compliant setting.

So any switching from closed loop to open loop (especially after having it mapped) would be switching from relatively rich to very lean.

And that preventing that rich / lean switching was the reason for improved low speed running.

And removing the sensors achieved this.

But that’s only the folklore I’ve heard ‘in general’ and not specific to Norton’s...