So I started off by getting the leads and software to try diagnose the car, after reading up a load of threads I had an idea what to expect.... Codes I got back were p0300, p0300, p0302, p0302, p0303, p0303. Is it usual that the codes are repeated? I googles the codes and the p0300 is random/multiple cylinder missfires and the 2 and 3 on the end indicates the cylinders but I feel there may be other reasons for the triggering such as fuel or the mix or something similar, any ideas anyone? Or shall I proceed to get new plugs and work my way through?