Had a look at a polo I was going to put a base map on it until the guy could get it properly mapped.

Done a log of boost, knock and fuel.  Noticed the lambda reading way high, yet the map request is where I set it in the map.

Only thing changed fuelling wise is lamfa map and BTS.  Raised the TABGBTS value from 400c to 850c, so primary fuelling was off lamfa.  Modelled EGT until 850c then drops into the BTS map.


What would happen if a narrowband lambda was run on a wideband ECU?

Will add that the ECU is a 032 QN, which has a 032HN file flashed onto it,  everything works such as speedo and rev counter.

Any suggestions.

Problem solved (well investigated)

Narrowband 040 maf sensor running on a 049 wideband ECU.

6 pin lambda is positioned behind the decat in 2nd exhaust port.
4 pin lambda is closed to the turbo, normally the regulating lambda position.