just pulled the head....guess what?....
It was the damn throttle screw!!!
the valve seats look good, and the valves too. my exhuast valve seals are leaking though. i'm borrowing the tool later this week to pull the springs. combustion chamber is beat up a lil but not bad. so i'm thinking clean up, new valve seals and put a new ve metal head gasket on then go. this happen at idle i guess thats why the valves aren't bent or broken.