I rang the fitters (profess Autogas near Cardiff) and they said straight away that they are getting lots of calls from people with exactly the same problem at the moment. When they check the cars, they are finding the fuel filters badly contaminated with oil, which in turn can clog the injectors. They have noted in particular, a number of vehicles seem to have filled up in the midlands area. If I have the same problem, it was filled at BP in Barnstaple.
Been advised to let it run out (which it has) refill it and see if that cures it, otherwise its a trip to Cardiff
Regards and discuss...!
Tony




