1997 bmw 540i shakes at idle and goes back to normal

[120alexis]

I have a 1997 bmw 540i at idle it feels like it is misfiring but goes back to normal idle. Check engine light is on for misfire but car runs good and dosent feel down on power.

[JimLev]

Vacuum leak or oil in the plug wells.
What have you done to rectify the misfire?

[edjack]

What codes are stored?

[120alexis]

Codes i am getting are p0300 random misfire, p0301 cylinder1 misfire, p0303 cylinder 3 misfire, p0302 cylinder 2 misfire, p1585 please refer to vehicle service manual.

[edjack]

P1585 = misfire detected with low fuel, according to Bentley.

Have you measured fuel pressure? How many miles on the fuel filter?