Thanks

It all started:
I got a check eng. light which told me the purge valve solenoid was bad along with a message that the post cat O2 sensor in bank 2 was not heating as expected (not sure if this also set the light off or just an error message). I changed the purge valve and because I am close to 200k (changed the O2's at 100K), I went ahead and bought new bosh O2 sensors, changed all 4.
Then shortly after I got the Service soon light and the error code P1191 - too rich in bank 2.
It makes some senses that I might have been running rich in the past but the new 02 sensor is more sensitive.

The temp has been in the teens and there is ice holding down my cars hood - so I have avoided anymore troubleshooting.
But, I do have some "mayo" on the oil cap so I should look into the condition of the CCV assembly even though it was all replaced 1 year, 20k ago.
Also - Killcrap mentioned a "faulty valve cover" crack between 4 and 6. In my mind I was thinking the valve cover gasket - but that doesnt make sense as the gasket does not separate the cylinders - but the cover does??
Anybody tell me how to smoke test the valve cover?

THANKS!
Kevin

I think you would be able to see if the valve cover was cracked. The way the CCCV vacuum lines are set up it is possible that a vacuum leak can affect one bank more than the other though.

Yeah- glimmer of hope, thank you!

I did a quick, hand across and check of all connections, so I am not expecting to find a hose cracked - but never took them off and looked, could it getting gunked up with "meyo" mimic a vac. leak?

Thanks

Do you have any mods, like a Cold Air Intake that you didn't mention?

The only symptom you have is hard start when it is hot?

tried to check my CCV system, a little suction on the oil dipstick tube (photo with glove) and a little suction on the oil fill - one layer of plastic pulled in about an 1".

BUT - did notice a large "gurgling" sound with the dipstick removed, is this normal??

Pulled the tubes of the CCV system that are on top of the engine - nothing "mayo-ed" up.

again, my CCV system is about 1 year, 20K miles old (not that it cant fail at anytime)!

I have no Mods, or cold intake
Car is running fine, hard start on a warm (fine on hot, fine on cold), which I think is related to my fuel rail not holding pressure when the car is shut down. Which I replaced the elec. fuel pump and filter/regulator (twice) and dual temp sensor to try and correct but did not.

THANKS!

(this suction test was done on a cold running engine)

When you replaced the CCV system did you also replace the oil separator valve?

NO, I thought the:
BMW Crankcase Vent Valve (Cold Climate Version)
took the place of a oil separator valve??
this is what I replaced:

You are correct.

https://www.youtube.com/watch?v=V8xy3SNfnTQ

Suggested causes of fuel pressure drop are near the end.