Hi, sorry to butt in on a thread. I have a 02 plate A3 tdi 100pd. It is running fine. I was thinking of have the car mapped, nothing fancy and was wondering about two other items guys seem to do on the diesels.
1- egr delete. What is better, delete kit or to simply de-activate as shown in the image. Either way how does the egr delete effect the remap ( delete before, during or after map)
2- decat exhaust pipe. Will this bring up an engine light and will it fail the mot if it is evident a cat is not fitted. Does it add much value to the tuning process. Do you have to buy a replacement pipe or can you break up the cat internals and knock the debris through to remove the restiction.
Again sorry. Can start a new thread if felt best.