[Max335d]

I recently saw one or two times on my 2011 335D it seemed that my turbos got stuck in the big turbo or high end turbo setting. I have a boost gauge and normally it doesn’t read lots of vacuum however it was pulling almost -9 pounds When I wasn’t on the gas when I did get on the gas, it would spool, but you could hear the turbos weren’t correct sounding to say and the small turbo just didn’t seem to be there. I had a problem recently with the cross over to the big turbo so I swapped out the main vacuum lines and the boost pressure solenoids, and all of those and the problem went away completely. Not sure what this is any ideas? It goes away when I turn the car off and back on

[lnxguy]

Check the compressor bypass and the ev valve/vac line that controls it. Located front of motor. EV valve is under the pressure convertors located besides the vac reservoir.

[Max335d]

Originally Posted by lnxguy

Check the compressor bypass and the ev valve/vac line that controls it. Located front of motor. EV valve is under the pressure convertors located besides the vac reservoir.

Could you send a picture of it? Not sure what to look for

[lnxguy]

Originally Posted by Max335d

Could you send a picture of it? Not sure what to look for

Follow the vac line that goes down to the front of the engine near the waterpump..

Then follow it the other way to find where the EV valve is located.

[Max335d]

Originally Posted by lnxguy

Follow the vac line that goes down to the front of the engine near the waterpump..

Then follow it the other way to find where the EV valve is located.

Trying to figure out if I changed that. I did the https://www.fcpeuro.com/products/bmw-pressure-converter-kit-11658509323kt#description kit and swapped all of those what’s the part number? For that valve

[lnxguy]

If you changed all that then you did change the EV. It's the smaller of the valves in that pic.

[Max335d]

Originally Posted by lnxguy

If you changed all that then you did change the EV. It's the smaller of the valves in that pic.

Yeah so that’s changed but the problem still happens occasionally

[lnxguy]

Vacuum pump ever been replaced? Seals leaking? There's also a inline screen or sorts where it connects to the rest of the system, see if that's clogged.

[Max335d]

Originally Posted by lnxguy

Vacuum pump ever been replaced? Seals leaking? There's also a inline screen or sorts where it connects to the rest of the system, see if that's clogged.

I’ve never replaced the pump. Is there a way to check it or just replace it

[lnxguy]

You'll see if it's leaking or not. Right at the front of the engine. I'd pull the hose that's connected to it and check the screen.

[Max335d]

Originally Posted by lnxguy

You'll see if it's leaking or not. Right at the front of the engine. I'd pull the hose that's connected to it and check the screen.

Any videos or pictures? Not really sure how to check the pump or screen

[maryjane]

Yes....get a mityvac very useful tool.