2006 325i Misfire moving cylinders

[dpm123]

I'm having a misfire and I was hoping for a 2nd (or 3rd, 4th, ...) opinion(s). The misfire started on cylinder #1, I read the code and immediately drove it to the shop. They tested and found injector #2 to be faulty and replaced it. The misfire then moved to #3. They did some more testing and told me that everything checks out mechanically. They told me it's not a plug, coil, or injector. They also said that compression was good. The next thing the shop wanted to do was send the computer in to be tested. At this point, I didn't want to pay what they were going to charge and I took the car back home. When they put the car back together and started it the misfire had moved to #4. I found some people who replaced the MOSFETs on their DME and that fixed their misfire so I pulled the computer out and continuity tested them but they all tested fine. So my questions are, does anyone have any experience with this type of misfire where it changes cylinders? Does sending the computer in for testing/repair seem like the next logical step? If not, what should I check first? If so, does someone know a good place to send it? I'm thinking about taking it to another shop to have another set of eyes on it but my wallet is started to bleed. Any input is much appreciated. Thanks!

David

Some other helpful info...my car has about 108k miles on it. I changed the spark plugs at about 90-95k. I did not change the coils, though I'm thinking of doing this just for peace of mind and to rule something else out. I bought the car used at about 70k. To my knowledge there was no major engine work done.

[krautcars]

Having same problem except my misfires aren't in order like yours, mine is random. There are places on Ebay that you can send your ECU too and they will fix as well as tell you if the ECU was bad. I have used SIA Electronics (iirc) and was pleased.

I am thinking of swapping my ECU from 08 328i and 08 X3 and see if that changes anything. I would test each coil by pulling off plug while running to see what cylinder is bad then, test the coil itself with a plug (and plugged back in) to see if coil is bad. I have known good coils, that are getting power to coil that won't throw a spark. Ohm on coils is good.