Hi All, I've got a 360 that is proving to be a bit problematic. it developed a fault where, in the first instance the 'go slow' cat overheating warning would pop up when the car was being driven hard; with prolonged running over say 7k rpm - then go away again when it backed off. I planned to get it investigated at the next service (due in a month or so - but the car is rarely driven) I drove it a few more times, and the issue got much worse - to the point where the car more or less wouldnt rev out with any sort of enthusiasm over 6k rpm; and the go slow light came on much quicker. As it turns out; the left hand ECU is generating a fault suggesting that the timing variator position was not being reached. Electronic timing angle found LH bank at 665 and the RH bank at 650; meaning that the LH bank is actually in spec; but the RH bank is out of spec - and 15 degrees different to the LH bank (when the tolerance is 3 degrees) sooo.. the cam belts were checked first... and were found to be in a poor state - so they were changed, and new Hills tensioner bearings were fitted - but; the timing couldnt be checked as the timing marks were missing; so the valve covers were popped off and the timing checked off the timing marks at the other end - apparently the cam timing is spot on with the scribed marks. but... back on diagnostics - virtually the same timing readings have occurred. many thanks for thoughts?