Very rough idle, check engine light is on, code 1222 on stomp test.
29+ Bmw M40 Rough Idle
Images. Almost sounds like a back fire thru air intake. Car idles rough on cold start, rpm fluctuates, shuts off.
The Bmw E30 No Start Guide Eeuroparts Com Blog from i.imgur.com
(530i in my case).it usually seems to be a cold idle misfire that (usually!) goes away if you just drive off.in my case, it has been there since i bought the car two years ago. The bmw repair guide recommends replacing both valves when fixing a bmw with a rough idle on startup. Here is my idle speech that i posted to the forum some time ago.
I'll tell you what i found out to fix mine.
A bmw e46 rough idle repair is a fairly simple job that requires replacing your disa and idle control valves. In my 435i, sometimes the idle is smooth, but frequently it stumbles. I know that idle instability could come from various different issues or a combination of issues but i recently got lucky and fixed the bouncy/rough idle on my '08 e92. Sometimes goes away after long (40 mile) trip (idle is fine, check engine light goes out).
