P0505 fault. Idle Control System

[Rhyds]

Hi wise ones
I know virtually nothing about cars & engines!!! Be gentle with me please

My Z3 2.8 2000 (M54TUB28 I think) is cleaning up nicely.

Starts & runs. Won’t rev.
I’ve changed split hoses.
Replaced faulty MAF
Started & ran nicely cold but wouldn’t rev when warm.
Got the garage to plug it in & got a P0505 - Idle Control System fault code.
Took out the ICV & cleaned it, was a bit dirty but it was working
Replaced it all…. & now it’s worse. More air in system? Not sealed

I’m not convinced that I fitted it to the intake manifold (?) correctly.
It seemed to be a push fit. But my small brain is telling me that it should have been a pipe or at least have something to tighten.
Any insight would be helpful.
Thanks
Rhyd

 

[colb]

Seems you have already changed or cleaned the usual suspects. A smoke test would find any air leaks you may still have.
Real oem parts site shows your 2000 2.8 is a M52 engine version. Parts diagram for intake here, check the gaskets were seated correctly when you put it back on.

RealOEM.com - Online BMW Parts Catalog

BMW parts Z3 E36 Z3 2.8 Intake manifold system

www.realoem.com

 

[Rhyds]

Thanks for the help
M52? How can I tell the difference or tell for sure?
I’m going to re seat the ICV today.
I noticed the rubber grommet where the ICV connects to the manifold. I wonder if it’s worth changing that.
Real OEM Parts is in America? Any issues getting stuff sent to UK?
Thanks again

 

[Althulas]

Just Google the part number and you will come up with a few hits. Always worth checking your dealer as prices can surprise you. Be wary of eBay sellers as they usually take the micheal. If your doing a bulk order of items you can make savings from autodoc but takes a while to arrive from Germany.

 

[Nodzed]

Thanks for the help
M52? How can I tell the difference or tell for sure?
I’m going to re seat the ICV today.
I noticed the rubber grommet where the ICV connects to the manifold. I wonder if it’s worth changing that.
Real OEM Parts is in America? Any issues getting stuff sent to UK?
Thanks again

Real OEM is just a parts catalogue. Put your correct car details in (put the right build month / year as per your log book as things changed through production years) then you get the correct part numbers to search for or relay to BMW parts department.

 

[Rhyds]

I’ve been hunting through possible faults…
I’m thinking DISA valve maybe not working.
Online searching revealed a video showing how to test the valve works.

View: https://m.youtube.com/watch?v=so6xLmg1zno


I’ve run through his tests.
Vac good but the flap does not move when key turned to run position.
@colb @Nodzed Would you get a new DISA based on this OR try & get another one to check first?
Thanks