Please forgive my next 'Noddy' question ... I've been setting the timing my 2000's engine with a strobe connected to No. 1 spark plug lead. I have marked the pointer under the flywheel inspection cover & have also marked the position of 4 deg BTDC (I think!). Presumably this is when the timing is correct: and this is when it's not (too advanced in this case): When I rev the engine, the mark on the flywheel moves downwards out of sight. Is this correct, or is the vacuum advance on the distributor not working as it should? I've still got a 'pinking sound' at getting on 3000 rpm (ie: about 55 - 60 mph on the road in top & at a lower speed in 3rd). Otherwise, the engine sounds good.