motec gear change ignition cut

[pengulns2001]

ive been using the motecs autoshift feature with the gear change ignition cut on upshift but everytime i shift the engine goes extremely lean and takes a bit to get back down to 12:1 ish... this is a much bigger problem now that its turbo'd

i guess my question is if im only cutting spark and not fuel why the hell is it getting lean and not rich, anyone else have this problem?

[pengulns2001]

ive been using the motecs autoshift feature with the gear change ignition cut on upshift but everytime i shift the engine goes extremely lean and takes a bit to get back down to 12:1 ish... this is a much bigger problem now that its turbo'd

i guess my question is if im only cutting spark and not fuel why the hell is it getting lean and not rich, anyone else have this problem?

[pengulns2001]

never mind, for anyone with the same problem lower your decel comp at high rpms... should have been pretty obvious but i missed it

[MoTeC]

Hi Pengulns2001,
Remember the mixture reading from a Lambda sensor reads excess oxygen, if you did not burn anything when the ignition is cut it will read lean. Same with a rich misfire, it will actually read lean becasue the combustion is stopping.