Engine is missing or sounds an acts like a burnt valve? Compression test shows 120 all cylinders, timing is good, plugs good, new plug wires, seems to smoth out after take off? I hear a popping noise when taking off too, sounds like it's coming from exhaust system. Vacuum gauge shows a constant bounce between 15-20 at idle. I removed intake, installed new gaskets cking for a good seal with a scope all ok. Vacuum gauge still bounces and still missing. Any suggestions?
