I have a very weird problem with a 2005 1.9 pd 1z octavia Initially the car just cut out, i found that the main relay in the under bonnet fuse box wasn't being triggered. I bodged in a remote relay to do a few tests and i could start the engine fine. but all manor of weird things were happening, the engine driven fan running randomly amongst other things. At this time there was no intersting codes in any of the ecu's So i repaced the under bonnet fuse box, and it keyed straight up. problem s