Thanks Paul. I have scheduled appointment at the garage on Tuesday. My mechanic will explore ignition problem and engine vibrations. I will definitely ask him to follow your advice and check your and "Loughnn" tips. We will check return line and L and T shape. Car parts market is Serbia is very limited, since we have two or three big wholesalers who are supplying most of the parts shops. They usual import regular things like brakes, filters etc. More specific things are not easy to find. There are basically three options: 1) used parts (which is always a gamble), 2) OEM Alfa Romeo parts (extremely expensive here due to tax and custom duties) or 3) import from Germany or UK (customs and shipping are doubling any price). Thanks for the link. Much appreciated.Sorry just seen this can you have a look at your pipes and see which version you have - depending on where the pipe branches from return line - you have L shaped and T shaped connectors - you will have both but you need to check how many of each.