misfire in the morning w/ses '00 328i
I've been lurking for the last 2 months since I bought my '00 328i 5spd. about a week after I got it, the check engine light came on one morning. I bought a peake tool and pulled the codes:
F0 - misfire cylinder 3
92 - EVAP capilary leak (0.5mm)
The car would run a little shaky (probably shut off that cylinder) until I restart it, after which, it would run fine again. I cleared the codes, and a few days later the light would come back on with the same symptoms and codes. I read somewhere just driving off without letting it warm up helps, but on some mornings (colder than 40F) even this didn't help. If I drove in the afternoon, or once the weather warmed up I would never get these symptoms.
Heres what I've done so far:
1) played musical coils, plugs and boots, misfire stays on cyl 3.
2) sprayed carb cleaner with engine running to check for vacuum leak, found none.
3) code 92 has accompanied the misfire only twice, not sure if it's related.
I'm thinking it's probably an air leak or a fuel problem specific to that cylinder, but it definately goes away once the engine has warmed to out of the blue. My next step is to replace the injector o-rings, but I'm running out of ideas.
For the injector seals and intake manifold gasket, can a smoke test find small leaks like these? I've heard about lifters going bad, probably a leak down test is in order?
If anyone shares these symptoms or possible solutions, I'd really appreciate some help!