In an ongoing attempt at sorting out my popping/banging/backfiring etc (described elsewhere), here is a bit of nonsense! Under instructions (I assume from Italy) my dealer changed the tank (including pump/regulator). I was not optimistic. However…took it for a ride and a HUGE improvement. I was overjoyed. Dealer then put a new pump in my tanks…refitted it…another run…RUBBISH! (Back to where we were). Se he refitted the ‘other’ tank. Guess what…RUBBISH!! So we think air leak in fuel hoses…or what? We don’t know. Any one else got any experience of fuel pumps causing any problems?