IDLING ISSUE

[sneary]

Exhaust seems fine when its running. I wouldnt be surprised if I had a bad cat though. One is original and then other about 5 years old

[bcredliner]

Bad 02 sensor would cause that one bank to run poorly and most of the time generate a code. Bad cat would have also result in symptoms on that one bank. Doesn't fit all the symptoms of a vacuum leak I would use propane or carb cleaner to check around the engine, especially the intake and check the air intake tube for a crack.

Can you monitor short and longterm fuel trim?

[sneary]

Which intake tube are you talking about? I should have mentioned I also replaced the intake tube off the throttle body because the vacuum hose that connects to it broke the nipple off the last time I pulled the hose off. Also when I did the valley pan I replaced intake manifold gaskets. Unfortunately the laptop I had dedicated to the bmw has crapped the bed so unable run the proper diagnosis on it.

[bcredliner]

Reference was intake tube connecting to throttle body that you have replaced.

Do I understand correctly that this problem started prior to the parts replacements you have done? If not, I suggest checking your work. The rule of thumb is there are no coincidences when working on a vehicle.

I suggest spraying carb cleaner, brake cleaner or spraying propane with the engine idling to see if you can locate a vacuum leak. Have you checked fuel pressure?

[sneary]

Yeah the problem started before I replaced any parts. I haven't checked fuel pressure yet. I have checked and tested all my fuel injectors before reinstalling. I will check fuel pressure and o2 sensors and see what comes up. I'll post the results afterwards. Thanks everyone so far for the tips. Since owning this vehicle I've done and replaced 90% of the repairs myself. Some jobs I've done a half dozen times. This one has me a lil stumped.