1994 Pontiac Firebird Formula 5.7L 350in3

Hey ,

I've got a '94 Firebird 350 stock with 150K miles. Starts fine, but after it warms up. The ignition knock, skips and pops. Much worse than typical knocking from cheap gas. I've have changed the sparks, wires, coil and good gas. But the problem still persist. Does anyone have any suggestions or comments. Has anyone experienced this type of problem before??

Your help is greatly appreciated,

Thanks. [email protected]

could be the optispark or crossed wired , doublecheck your wires.

chech you timing