Some information that may help regarding auto ball launching and lack of power.I was having this problem intermittently and thought the coil was losing power. I researched this thread and followed some advice and removed the auto launcher coil sleeve and replaced it but it didn't help. I cleaned the original and put it back in. I have previously done all the others tips recommended in this thread and they have worked but this had me stumped.
I cleaned the shooter lane with some novus 2 and the playfield where the ball tracks, no good.
I then noticed that the auto launcher was at times hitting the shooter lane protector on the right side. I pushed it away and it launched balls perfectly. After trying a few things I loosened the screw slightly on the auto launcher pin and now it works perfect every time.