Odd starting problem; Bobcat e42 excavator

[D&D]

I have one, but I’m skeptical if it’s a good one. Any recommendations?

The inexpensive ones are about as accurate as one really needs.
Such as this https://encrypted-tbn2.gstatic.com/...U_VhNwytBt8a06oMZJh0ibIggCQRakseM0P-H9OapTIqg

If you really want to move up to an analyzer the Foxwell BT705 is pretty decent for the price.