Loose timing gear that is out of spec can cause your mechanical timing to skip teeth, most the time under load.

READ THIS:

MECHANICAL TIMING HAS TO BE PERFECT LOWER AND UPPER.

If your mechanical timing is not set to spec. All you are really doing is being fucking retarded and playing with your motor and possibly damaging it.


Stop being lazy. Stop asking questions. We have told you wtf to do. Now go do it. Set designated links on timing dots (mechanical) install cams correctly. Seal covers. Then set ignition timing. Once your done with that see how it runs. Then go from there.