I'll look into Forscan this evening and see what I come up with. Based on what I have stated, do you have any suggestion as to where I should focus my attention?An oscilloscope is really expensive. If you have Forscan see if you can go to the data view for your sensors then see if it has a graph function.
Like I said before I doubt this is an issue if you aren't seeing a DTC for a crank/cam sensor. Those are type A DTC'S which set immediately upon an error occuring. If you have no code for that then I would look elsewhere