Originally Posted by davidnormanuk
I have read on a website it is not reccomended on turbo charged engines is this correct?
Cheers
Dave
All new cars since about 1992 have had closed loop lambda.....
The lambda control only operates under certain conditions, floor it and it'll revert to the mapped settings.
https://passionford.com/forum/viewtopic.php?t=248973
See Stu's post about half way down that page.