Lean codes, oil leak, rough idle, misfire NOT THE DISA
I know this has probably been talked about way too much and I could probably search for another hour and find what I want but I am tired after working all day on my brake conversion.
My car has a crappy idle, it has a rough idle like a crotch rocket, MIL is on for lean codes, misfires, and I have a nice oil leak coming from under the intake manifold somewhere. Sometimes this car does not want to start right up when its cold, it idles super rough and usually stalls after a couple seconds of running. Then it fires right back up and makes popping sounds in the intake.
The car drives perfectly fine but when i come to a stop it idles rough. If I sit holding the brake its fine but if i put it in park (like at an ATM) then after about 15 seconds it drops and almost stalls. If I don't shut it off and restart then it sounds like a Subaru at which point I get the misfire codes.
I called BMW looking for intake gaskets and the parts sales guy said something about a crank case ventilation valve. BAVAUTO.com has the vent valve and hose kit for $170. Does this sound like a good direction to head or am I missing something. I was thinking the fuel pump was soft failing but I have 48lbs of pressure at idle. Also I already replaced the DISA valve and had a very slight improvement but not enough to warrant spending $190 at BMW dealer.