Its a vuk. Vertical upkicker. If the plastic ball nest part brole off, itll need rebuilt. Youll need to look under the playfield to see whats going on. Currently have this on my list to do on my game. 17 dollar part

Take some pics so we can see the issue.

Sounds relatively simple to fix. As amkoepfer said, it could just be the red plastic cup the ball sits in. The get brittle and crack over time.

Any idea of the coil that activates the mech to kick the ball out is working? But into coil test to see if the coil functions

My thought is your issue is the switch associated w this outhole.

When the ball lands in the hole, it presses down on a little metal switch arm. This then tell cpu to activate the coil to kick the ball out. If it’s intermittent, like you’re saying, it’s probably just needing to be adjusted up a bit.

If you have to rebuild the vuk, i say set the game on fire. Ive been workin all day on 1, and it is a pain in the ass! Doesnt help that the pbl rebuild kit has the hole too small for the metal dowel