I have an issue with valve chatter at constant or lower rpms.... accelerate and it goes away. I done a full tune up plugs, wires, dist. cap, rot. button, o-2 sensor, air filter etc....
only thing i haven't changed is the Fuel filter, but it doesn't sound like detonation it sounds like chatter....
Are there any routine maintenances that need to be performed such as adjusting valve lash etc....
any and all help is appreciated...
jason
