Quoted from Who-Dey:
All you gotta do is bend the prongs on the auto plunger until the ball starts traveling the right path. You may have to adjust it after that periodically also but in my opinion there is no need for bending the guide rails and waxing the playfield or anything else. Find out which prong isnt touching the ball of the auto plunger prongs in resting position and all the way forward position and adjust accordingly. Its literally a one or two minute fix but for some reason everyone wants to keep trying to fix it the hard way.
I have had hit and miss results here too. I can manually plunge all day 99.9% of the time. I'm lucky if the auto plunge works 70% of the time.
What's odd is, it will work 10 out of 10 times, then 6 out of 10. Then back to 8 out of 10. Some auto plunges around the loop are faster than others. It's erratic, and there seems to be no rhyme or reason to why it's not working all the time.
The plunger prongs, both left and right sides, rest on the ball in the shooter lane. Slowly, and manually moving the auto plunger mech by hand through its entire movement, I can see that the plunger prongs are contacting the ball, both left and right sides, through the entire auto plunge process. In theory, I have this mech adjusted perfectly. In game play however, it's not 100%. And again. It's erratic. It's not like it's hit and miss all the time.
Along with the prongs contacting the ball through the entire process, there has to be something we're all missing here.
I've adjusting the top rail. I've waxed the shooter lane, the balls, the playfield. And still, it's hit and miss.
I've learned to live with 70%.