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X3 E83 (2004 - 2010)
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Old 08-07-2012, 11:40 AM
cfunicelli cfunicelli is offline
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Location: Aurora
Join Date: Aug 2012
Posts: 2
Mein Auto: 2004 X3 3.0
Rough Idle/Oil in Cylinder/SES Codes/No Smoke

I bought a 2004 x3 3.0 back in July of 2009. Seemed to run ok, but after a couple weeks my SES light turned on. Ever since then it has been on and I keep on getting different codes and issues with the car.

To start: Idle rpms would move from about 1000 to about 2500, then drop and start all over. I assumed vacum leak. Saw that the small hoes comming off my intake book was almost broken in half, replaced entire intake boot and that seemed to solve that problem. ow I am getting codes for to lean bank 1 & 2, rough idle, sluggish performance, rmp higher than expected, and multiple misfire codes. My average mpg is about 16 city right now according to the car, but I dont know how accurate that is. Also, as far as I am aware, there is no white smoke comming from my tailpipe or blue smoke, but there is oil on the head of 1 of my spark plugs, I beleive the #3 cylinder.

After reading a bunch of posts and threads I am thinking it could be a bad or failing oil separator. I live in Denver CO so it gets pretty cold here in the winter. Usually my trips to work 5 days a week are 30min or less, with shorter drives to the store mixed in. Would the faulty separator cause all of these issues, or most of them. I want to get this fixed without spending a bunch of money.

Any help is appreciated thanks!!
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Old 08-07-2012, 07:21 PM
suthtow suthtow is offline
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Location: pittsford,ny
Join Date: Jul 2012
Posts: 124
Mein Auto: tow truck
It can. I would replace it before it gets cold. If it fails in the winter it can suck the oil out of the oil pan and right into the intake. Seen it many times in ny.

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