Well, I'll do a last update on the tread. Today I cleaned the MAF, because I missed sufficient accel after 3000 rpm and I can say that I think this was the major problem. I can get boost and hard accel till red. I'm seeing the occasional black exhaust puf when reving in red for the first time on this car. I still have no idea what to do with the IMRC. I made a filter, but still getting the fault. How restrictive should this filter be? And finally I think that blanking the EGR will be very good, but I have no time to do it cause it needs programming.