My stilo started to misfire, only slightly, and has been for a diagnostic check at garage. Fault traced to ignition failure on No. 1 & 3 Cylinders. Have now been told that this has caused a fault to my ECU - and apparently this is a common fault.

I'm at my wits end, recently head gasket went and broke the bank - Car still running but no faith in it any longer.

sounds like you need some new coil packs £40 each ish