[scotthilly]

Hi all,

Wanted to log my experience with a few different issues I'm facing in hopes of getting feedback and helping anyone that experiences this again.

Car - 2011 335i, 6mt, 88k miles, stock beside mppk and mpe
Recent maintenance - spark plugs, coil packs, oil pressure sensor, charge pipe, valvetronic servomotor all within 10k. See below for further explanation.

Last month - everything running fine until CEL. Codes were
2DCE (Valvetronic - no adjustment possible)
2EOF (Valvetronic - deactviated).

Took to my indy and he replaced the valvetronic servomotor itself and the valve cover gasket for $1300. He noted they had trouble reflashing the system and had to do so 4-5 times to get the valvetronic to relearn, and said I might have some weird quirks and might need a software update. As I planned to bring the car back 2 weeks later I was ok with that.

So far, in 8 cold starts, I've had the *cold start sequence to 1200 rpm* *after 30 seconds, dip down to 900 rpm (normal)*, then dip down to 500rpm for one second then catch itself, *then back to 700. This has happened every time and it seems to idle slightly rough but again, only on the first start of the day.

Any warm start, and once warm, car idles totally fine. In normal driving it is perfect. I should note for the lifetime of my ownership (15k) I'll get a crank or two longer than normal on warm starts (wondering if hpfp is on it's way or if it's the starter).

On a drive yesterday of 250 miles, I noted some hesitation betwee 4-6k at full throttle in 2nd gear on highway pulls. I'm on 225' older Blizzaks so I wondered if it was DTC stepping in. Tried full throttle once more and immediately got the CEL and some violent shaking with the following codes.

P0305 - cylinder 5 misfire
2eof - valvetronic deactivated
2d43 - valvetronic adjustment fault range
2fac - combustion miss, spark duration, cylinder 5
2efe - misfire, several cylinders
2fo3 - cylinder 5 misfire damaging cats
2eeo - fuel injection deactivation

I'm going back to the shop on Monday. I'm thinking there's correlation between the valvetronic replacement, immediate cold start weirdness, and the misfires. I'm not sure if my shop damaged an injector, or if a coil pack or spark plug is slighty off, or if the valvetronic needs to be reflashed once more or if it's the need for a software update. I'm leaning towards valvetronic reflash because of the fact that code keeps coming up

If it is an injector I'm hoping my guy will at least split the cost with me. Is that crazy?

I'll come back with a diagnosis but if anyone knows anything in the meantime, please don't hesitate to chime in. I've found countless threads where the above list of items (injector, coil pack, plugs, etc) was the issue. With that said, very few people have had valvetronic codes come up with the misfire.