Rough idle

[jr325i02]

Ok so I cleaned the intake replaced my intake boot and checked my hoses, and it still has a bank 1 bank 2 too lean code. I have switched the MAF sensor with 2 different ones and it idles worse. I really don't think it could be my MAF sensor, or could it??

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[MarcoZandrini]

The first step in diagnosing a problem is to scan the engine computer (DME) for codes. I bet you’ll end up with codes P0171 and P0174. They are classic indicators of vacuum leaks. The only way to find all of the leaks is to have the intake manifold smoke tested.

Please stop throwing parts at the problem. That wastes money, doesn’t fix the problem and it angers the BMW goddesses.

[jr325i02]

Sorry I didn't mention that my intake boot was ripped

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[MIKYZZ4]

Test the fuel pressure at the fuel rail Schrader valve.
Test at idle-2000rpm-3000rpm.
report back with psi readings.

[jr325i02]

Ok so I noticed that when I take off the oil cap the engine starts to shake alot, like it wants to turn off.. the oil cap has alittle vacuum when I take it off. And when I put my hand over it. Could it be my cvc? Those are pictures of it from the bottom. Is that with in the normal range??

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[MIKYZZ4]

From the looks of it, your CCV Valve seems to be leaking oil,
Replace the CCV System:https://www.fcpeuro.com/BMW-parts/32...002&m=20&e=177

[jr325i02]

Ok so I got the ccv replaced got the cranck case sensor replaced and the fuel pressure regulator with fuel filter replaced and I still have lean codes...wtf???

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[RobertDenali]

Use a smoke machine to find the source.

You more than likely have multiple leaks.

[MIKYZZ4]

Test the fuel pressure at the fuel rail Schrader valve.
Test at idle-2000rpm-3000rpm.
report back with psi readings.

From the looks of it, your CCV Valve seems to be leaking oil,
Replace the CCV System:https://www.fcpeuro.com/BMW-parts/32...002&m=20&e=177

Use a smoke machine to find the source.

You more than likely have multiple leaks.

You seem to have only partially performed the recommended suggestions,
and replaced other parts that were never mentioned.