Check your PM.
Engines are now running excellent, I couldn't be happier with the exception for my tach intermittently working, it is not jumping on and off, rather it
That's what happens with cheapo meters! (Sorry, but I have one of those as well.) Try a better quality meter (borrow one from Auto Zone) and that nonsense
You need to do a WOT plug check. To wit: Run her at full throttle for a few minutes (in gear), then immediately shut here down. NO idling allowed! Next,