[nathano]

On a cold start my 325i N53 has a rough idle

After running for a while and it gets up to temperature it runs a bit smoother.

I've taken it to a mechanic, then a BMW specialist but I would like a few more opinions



It's thrown up all sorts of codes:

P0172 - System too rich Bank 1

P0174 - System too lean bank 1



After taking it to the BMW specialist its given codes

2A2C - Mixture control 2

29E1 - Mixture control 2



Then on the way home from the specialist, it gives codes

P0302 - Cylinder 2 Misfire detected

P0305 - Cylinder 5 Misfire detected

P0300 - Random/Multiple Cylinder Misfire detected





These codes all disappear as soon as the engine is up to temperature or on a restart a few hours later



Between the specialist and mechanic they've checked:

Coils

Injectors

Spark Plugs

Smoke test for Air leaks



The specialist has suggested its a fault to do with the rocker cover but I was wondering if there is anything else possibly causing issues



Thanks

[Phil325i]

I've replied to your duplicate post on Bimmerforums...