Check the angle of the autolaunch to make sure it's hitting the ball square on. Maybe a new coil sleeve or plunger to decrease friction.
Make sure you have the right coil on the bridge diverter
Check the wireform bridge to see if it's bent or leaning the wrong way. Make sure the ramp is securely tightened so the bridge is not loose.

A lot of problems are typically due to age and wear, which can vary from machine to machine, and are not necessarily design flaws from the get-go.

I've heard using a magnet on the back of the diverter works wonders. There's some discussion of that here:

http://www.pinballrevolution.com/viewtopic.php?f=4&t=1046

Ramp diverter magnet is one of the best and most necessary mods, a year of tweaking and it was still inconsistent without the magnet.

Well the auto launcher is pretty easy to bend one way or the other to get it where u want it.that's what I did there are also other tricks but thats all mine needed

If you bend the auto plunger and are still having trouble making the loop, clean the loop thoroughly and wax it. Almost every machine I have bought has had dirty loops or orbits and the friction is too much for the relatively weak auto plungers to overcome.

As for the diverter, I would buy a new one and do the magnet mod on it. I don't need a professionally restored pin, but I hate Jerry-rigged stuff like that.

Info on ball launcher problem here: http://www.edcheung.com/album/album08/pinball/tz.htm

And for the rocket ship bounce out, you need the anti-bounce post. I installed this and haven't had a bounce out since- http://www.retroblast.com/articles/modzone_3.html#Bounce

TZ often bounces out of the lock, Its known to be erratic even on new machines.

I bent the top metal piece that is curved upward in that area even more so I never get a bounce out. My friend did the same to his game and his results were not quite as dramatic as mine, but a major improvement none the less.

I disagree with the comment that all games do it - even when new. My sample TZ never bounced out, and still doesn't. If it bounces out, it's likely because a spacer is missing on the far/top two through-field bolts, so that the lock entrance is too low, causing the ball to hit it.

My lock mech still has these, as I've been the only tech on my machine since it came from Greater Southern many years back.

All you need do is this I haven't had one issue since .cost nothing20150218_041313.jpg

I'd make sure your table is correctly leveled.

Mine doesn't have the post and never misses the rocket ship

Mine rarely did it but I put afix there anyhow y not its not hurting anything

BigD, mine has the rocket bounce one out of 50 games and I like your idea and will be using it.

I dont even go for the skill shot lol not worth

i used something similar:

TZ bumper.jpg

It's a rubber foot - bought in a pack of 4 from eBay. I also put one on the edge of the power field behind the top right pop bumper, behind the Magnaflip sign, to stop the ball getting wedged in that tiny gap once in every 500 games.

Are your welds still secure on the scoop weldment? Also check that the tip of the plunger is not out of round where it meets the ball, hardware is tight, and that the coil sleeve isn't worn.

Just wanted to give everyone some feedback and post my results. My game had the normal auto launch ball rattle not making the spiral loop every time. I checked out the link in post #13 that dluth put up. I added one washer as the writeup suggests; mine already had one washer so now up to a total of 2. This seemed to help, but not fix the problem. I bent my kicker arm slightly to the right of center and so far every ball I tested has made it around the spiral loop. I was even able to keep the small round rubber that is between the 2 shooter lanes

I would suggest to people adding a washer or two and experimenting around with bending their kicker arm as I did. Not sure if everyone is doing this or not, but I put my game in continuous gumball test mode while I was diagnosing the problem so it would continuously launch balls and I didn't have to manually feed them to the auto launcher.

Re guarding bounce out from the rocket, one point to keep in mind is the switch wire may be bent to far forward for what ever reason, you need to check this, sometimes ball can hit switch wire side'on & deflect off

Added thin washer on the left of Mech & put a Refrigerator strength magnet on the backside of the Launcher cradle. thanks guys!