low idle

[hambone1983]

Hi folks,
Lately I've been noticing a very low idle. The 2006 X 4.4i feels like up and down in engine noise when at complete normal temperature. But when the car is cold the low idle is not felt.

I've tried everything, clean gas, gas/fuel system cleaner, new plugs, new air filter, brand new oil change.. the tech at the bmw dealer tells me the X usually has a very low idle and is very sensitive - i don't buy that.

Being such an expensive engineering, the idle at the least should be nominal and should not let this happen.

thanks for any input.

[schurikde]

Tried an other MAF sensor?

[hambone1983]

nope, where would the maf sensor be? sorry for the retarded question

[schurikde]

It's part number 1 on the picture. Mounted after the air filter housing.

hot film air mass meter

[hambone1983]

thanks, i will check that this afternoon.