Quoted from Chitownpinball:
Ended up just being an exhausted spring. I cut it down shorter and its working great now. I guess flipper rebuilds should be on my list....game shoots fine though. I even get air balls off the G target next to the left ramp. Some times right down the left outlane....grrrr
Glad you got the flippers worked out. Might be a good idea to just rebuild flippers. I'm starting to do that on all games I get. Good to make sure right parts are installed and everything setup correctly. Make sure to replace the bushings when you do a rebuild. They are not included in the kits.
Air balls off the left ramp targets are common. They take a pounding and the metal backside gets bent back. This is what causes balls to ramp off. You can try to bend it straighted and put extra padding behind the target or get the reinforced targets. Balls were flying over the flippers on my game but these targets fixed it. Busted the corner off one of them a little while ago and need a new one myself.