Quote:
Originally Posted by JoeM3SSII
Quote:
Originally Posted by dreamspeed
Can't be the plenum not mounted correctly, I mean I've taken that thing on and put it back on over ten times now.
The only thing I've pin pointed it to is the noise goes away when I disconnect the idle air tube from the plenum and comes back when I reconnect it.
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Then it sounds like the idle control valve fails to close shut when you accelerate. This could be from deposits in the ICV. The valve leaves open a slot that bypasses additional air around the butterfly valves and the engine suction blows it like a whistle. In idle the valve is not closed so your idle will be normal.
why are you going through that trouble when there is an extended BMW warranty bulletin on the ICV ? you can just get bmw to replace it for free. |
Do you have a link to the bulletin? I googled this prior and only found some posts where people got a letter from BMW indicating an extended warranty for the ICV but it was VIN specific. Some people called their BMW to check and they weren't covered. Personally I never got a letter regarding ICV warranty.
Also, if I were having idling issues or getting a ICV error code I'd be more inclined to bring it into the dealer but currently the cause of whistling is still TBD. I've dealt with BMW warranty before and I'm pretty sure it's going to go down like this....
Bring car in and complain it's the ICV. SA will say ok but we gotta do our own diagnosis first and it's going to be 200-300 bucks. If the repair is covered by warranty then your diagnostic fee will be waived... they keep my car for a day or two and tell me there's no issue with your ICV. 300 bucks down the drain