Hi there. Have a 535 d lci 08. I have a loss of power after 3000 rev. All is good upto then but over take is out of the question. On kick down the revs struggle to increase and if going uphill they will not increase. There are no lights on , no smoke, and the car drives fine apart from the loss of power up top. I have put on a super chips around 4 weeks ago which made the world of differance but I have now gone back to standard map with the same problem.
Any ideas or thoughts would be appraicated.
Many thanks Jp.