540i Problems

[Tiger]

It is located in the rear of the engine... underneath the intake manifold.

[tim]

It is located in the rear of the engine... underneath the intake manifold.

I think you mean the PCV.

The ICV is on the top of the throttle body: the smaller part of the air boot (about an inch and a half in diameter) that comes off just ahead of the throttle body and attaches just above it is where the air flow for it comes from.

Check this diagram:

http://www.realoem.com/bmw/showparts...84&hg=13&fg=15

- the icv is #9.

They don't all look like that, and if you have ASC, you have a different boot, but they all attach in the same place as the diagram.

[MBXB]

Here's a pic of the idle control valve. The barrel should freely rotate in the housing. There's a spring in there. You'll be able to tell when it clears up. This one was gunked up till I blasted it with cleaner.


http://community.webshots.com/myphot...ecurity=NPzlAt

[ChrisMcC]

I checked the ICV and cleaned it out. It was not that dirty but did have the normal gunk in it. When it is disconnected, the barrel is not completely closed. Is this normal? Also, I let the car sit for an hour with both battery terminals disconnected and the key in the #2 position. I also tried to turn the car over several times with the key disconnected to get that last bit of juice out of the system.

I went out and drove the car for about 20 miles. It ran perfectly for the first 17 miles and then I got the damn check engine light again. Code 1222 which is the same code I have been getting. This is after I went down to the gas station and put 93 octane in the half empty tank.

I pulled the little hose that is on the PCV plate and seem to have vacuum there. What I did notice was that I was decelerating when the light came on, not at a complete standstill.

I am running out of ideas. The plugs are normal stock plugs, nothing fancy. This seems to be an intermittent problem. I rarely if ever have the check engine light come on when it is warmer than say 50 degrees. It's 20 here right now in Ohio.

Could I possibly have an intermittent injector problem?

Any ideas appreciated at this point.

Thanks,

Chris