who can help with a couple of coding problems on my '04 545i? any individuals or even some site sponsors, i have a multiple misfire issue over a year old and driving me crazy! i just had dealer update car software to latest version ran great for 1 day now back to same problems i need someone that is pretty sharp on the programming/troubleshooting part? any names and contact info please?

i do have a copy of the ncsexpert, inpa ect..