""A lot of simple scope tests can become overcomplicated too easily in my opinion. Extract what you need in the easiest way possible and keep it simple whenever you can would be my advise. ""

Agreed Sean

In my animated example, I draw attention to the wandering effect purely because it is an interesting observation & something that might be useful.

My approach with jobs such as this is to firstly confirm acceptable cam & crank sensor output & then look for any signals that might suggest damage to the phonic wheel.

If you have access to a known good example then alls well, but if not, it only takes a few minutes to pop the top off & check the tensioner protrusion.

The diagnostic path of least resistance is the way.