P code expert?? What's the trim "system"?

[80stech]

Kevinkay , have you checked the vacuum line that goes to the regulator on the fuel filter. It could be leaking vacuum causing a vacuum leak and a rich mixture, or if the regulator diaphragm is leaking could cause extra fuel to be delivered through the vacuum line. As far as the pressure loss after shut off, if you could install an inline shut of valve (or even a check valve)before and/or after the filter you could try to narrow down exactly where the fuel is leaking back. Pinching off lines sometimes works but not so dependable. What software are you using to check your adaptation numbers ?

[80stech]

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.

[kevinkay]

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

[upallnight]

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

[kevinkay]

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)

[bcredliner]

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

[bcredliner]

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

[kevinkay]

Originally Posted by bcredliner

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:

[bcredliner]

Originally Posted by kevinkay

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.

[bcredliner]

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

Suggested causes of fuel pressure drop are near the end.