[dave6672]

Originally Posted by 72c20customcamper

Could have burnt an exhaust valve.

To OP if the valves are sticking I have used mmo and pb blaster to lube the valve stem . On a 6 cylinder I once had to actually tap the valve and spring with a hammer and pry it back up. This was before I got the engine broke free. A 63 lark with 22k original miles . I bought it in 1980 the car had sat untouched in a basement garage since 1968. Have to say the car ran great after a few hundred miles.

Thanks for the input. I'm going to pull off the valve covers and lube the stems and go from there. Also picked up some fuel treatment so we'll see how it goes.