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Old 05-29-2007, 12:53 PM   #4
Registered User
Join Date: Nov 2004
Location: montreal
Posts: 44
My Ride: 325ci & m coupe
i'm having the exact same problem. you can't automatically assume its the lifter...

however, it is worth it to flush the oil using a treatment. In my case we put a liter of diesel fuel and let the engine run for about half an hour before flushing it out. If it is a sticky lifter, the morning after you do this treatment, you should notice a difference.

Have you had a compression test done at cold?

In my case, i changed the coil on the misfiring cylinder, changed the spark plugs..... nothing. I then brought to a stealership, and they diagnosed the problem to be a cracked crankcase and faulty vent valve... Still did not help the problem... After this I tried the diesel treatment... but nothing changed.

I then brought the car to a trusted head machanic at another dealership, and he reprogrammed my DME. It now seems to be working better. I still get a little shake at cold start, and in 2 weeks, got only 1 misfire. It seems more intermitaent now, whereas it was every morning before.

Finally, i've decided to lay off it for a while and see if the problem becomes more significant, i.e. decrease in performance or worse symptom during cold start.

Let me know if you have further developements, and i will do the same.
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