Tortus

Installed cam, headers, 10% underdrive pully. Now I'm tuning. Tuning is coming along fine except one problem I can't figure out. I have searched high and low on the internet with no luck.

When I get into full throttle the wideband is reading 85 Lambda more or less, but VCM Logger shows that I am 5 to 10% lean. When I am not at wide open throttle and the wideband reads 85 Lambda the VCM Logger will record 85 Lambda. The logger only records different information than the wideband during WOT.

Can anyone explain to me what's happening please?

Tortus

luka2sb

i think i need more details about your setup.

are you saying that at WOT, your physical wideband gauge shows lambda of 0.85, however the signal inside VCM shows 1.05 lambda?
Post a picture or something, or describe it in a little more detail, post your datalog here if you want, and i'll try to help.
My initial reaction is that you are looking at 2 different things, either recording the wrong variable in VCM or something.
1 wideband, is it in where the x-pipe merges? or one one of the bands? did it replace one of the factory O2s? if so which?

Creatre

Post the log.

Tortus

I figured it out. It's all good now. Thanks