Fault finding. 2000 Z3 2.8. Hi guys, has anyone had a similar problems

[Sykesy]

I winter garaged my z3 from November 24 until March . Started it up and ran it every 6 weeks or so. When I start it now it idles ok but misfires and will not rev past 2000 rpm. I've had my cheapo obd11 code reader on it and it gives me 4 faults...

 

[Sykesy]

Sorry, the faults are these.2 years ago I changed both of the camshaft sensors so assume that these shouldn't be faulty. Has anyone any more ideas please?

 

[Mike Fishwick]

How long did you run the engine for? I would say that half an hour, working the engine up to about 3000rpm is the minimum. Short cold runs will soon cause the plugs to become fouled. Short runs on a cold engine, just to see if it starts, are the very worst thing you can do.

 

[Rudyrov]

If it were my car I would examine each system and its connections, clean connectors, blow out pipes and tubes and make sure something hasn't crawled up my intake while in storage. Most likely all the systems in question are not defective and the culprit could be something else.

 

[ChrisD]

The 3 ‘circuit’ codes strongly point towards a wiring issue: broken wires, corroded terminals, loose connections, etc. I’d concentrate on checking the engine harness first - the IAC code may be a secondary issue.

 

[t-tony]

Have you cleared the stored codes, then ran it to see which, if any come back? What brand of sensors did you fit?

Tony.