Engine mechanical issues are becoming more common in our repair bays today, and they can be difficult to diagnose. Engines are built with more valves, camshafts and complex variable valve timing systems. All of these components fail, and there are very easy tests that a technician can do with a DSO to confirm the issue. Guessing is not an option for these failures, if you are wrong it could mean a lot of expensive parts and many hours of lost labour.