Kappa 20turbo 16v /misfire

[Reuben M]

Good day.
My Lancia Kappa has a misfire that occurs when the engine is hot. The check panel displays Aviara Avianto contolle motore which translates to motore control system defect.

The misfires gets worse, comes and goes...it has become so bad now that I can hardly drive 15km without it coming in and out..It has the same effect of a dead plug..I have subsequently replaced the spark plugs, changed out the coil, cleaned all the various electrical connection plugs of the engine management system, checked hoses etc.

Ive had this problem a few years ago and this was due to a broken intecooler top hose, the problem was solved then by replacing said hose.

However I have now checked and removed both intercooler hoses to make sure That they re not cracked.

Any ideas as to what to do? or what could cause this please?

I do not have access to the Fiat tester but know of where I can go to have it checked with it if needed.