Thanks for the replies it done 66,000 miles Mark when it runs poor it does run like a pile of shit with a miss but it happened so brief like this in the work shop that making any diagnosis was very difficult. I just thought if there was a known fault with these then I would try and get a head start and start looking there. I have have a scope and amps clamp on this all day to see if it would fault and sat my self on the wheel aligner all day which is next to the l200. Every time I finished an alignment I started the L200 to see if it would fault. But you guessed it, it's been spot on every time.