2004 X5 Injector issue

[upallnight]

Originally Posted by oldskewel

You could also try swapping injectors between two cylinders to see if the problem moves.

Also, most of the story sounds pretty normal, and your debugging is great. Except what about this: "2 plugs cores were burned and the tips of the plugs were burned right off" ???

I'd try to figure out an explanation for that one and not just hope it does not come back.

If you do swap out the injectors buy some new o-rings. The o-rings are probably pretty deformed from years of heat and cold cycles. Reusing old o-rings will just cause problems down the line. If you know anything about BMW's rubber o-rings is that you don't want to reuse them.