[aussie_bob]

Thanks 94Leb ..... I did check the engine mounts way back but kind of discounted them as a problem after that and since the vibration has come and gone about once every 10 days. I am not sure how an engine mount could fix itself but it is possible. When inspected they looked to be fine and I couldn't see any cracks or obvious failures.

I would like to probe the crankshaft position sensor and the cam shaft position sensor outputs but am having trouble getting to them to "back probe" and figure I may need to use insulation piercing probes . Any ideas ?