Good day guys, I recently changed my eccentric shaft sensor, valve tronic motor and vaccum pump , after getting my car back from the mechanic I noticed that around 500- 1000 rpm I get a rough idle also when I'm driving and accelerating between 1500-2500 rpm I get a hold back in power but after that the car runs fine, any ideas as to what is causing that , I just changed my spark plugs and my coil packs are good, the car wasn't having this problem before I changed the parts 😳. Any help would be grateful I have a 2008 e60 520i,with an n46b20 engine thanks.

 

Check to make sure no hoses got cracked while doing the pump. You might just have a leak some where. Also since you did the motor check your injectors. There is probably nothing you can pinpoint out unless a code comes up. Visual check or smoke test is the best thing you can do and hope to see something that was missed during re-install.