I'm currently running a custom long life cat back exhaust system on my 2001 s3 8l. The car has had the usuall stage 1 upgrades, tip, filter, stage 1 map etc. I have got myself a decat from another forum member which when lined up underneath the car seems to fit. The issue i have is that the standard cat on the car has a lambda sensor, the decat has a hole for this but is blanked off. Basically i want to avoid any fault lights from coming up on the dash. My current lambda is well and truly stuck in the standard cat even after heating up it will not budge. Whats the best way around this issue?
Has anyone else had this issue or know where i can find the answers, i have used Google search and search on here but cant seem to find much. My engine is the 210 bhp from factory model not sure of the code but hopefully someone out there can help and advise me?
Thanks in advance.