Hi darren

yes mine was auto but when it had a problem a few months ago it caught me by surprise.

It was totally flat and backfired through inlet, extremely week mixture.

Tried maf as it seemed obvious, checked fuel pressure then reading through live data found barometric reading very low I think about 700 mbar.

Thought strange so found sensor I did not know existed and fitted substitute. Read about 1 bar and went like stink. Put the old one back ran terrible.

So the ecu does use it for fuelling obviously reducing fuelling to take affect of lower density of air at lower pressures.

What surprised me is that software allowed it to accept 700mbar as a sensible reading and not default.

Incidentally disconnecting made it default to about 1 bar and ran ok.

This may not be the problem with the current car but just wanted to clarify position incase anyone else has the problem and reads these posts.

Best regards

John