bad gas
the engine timing needs to be adjusted
What causes a misfire can be a number of things. But from what you are telling me, you may have water in your oil and maybe some bad gas inside your engine. If you have pumped in some bad gas, you may have a filed out the sparkplug at that #8 cylinder.
No gas in the engine
Depends on which engine. There were four cylinder gas engines, six cylinder gas engines, and an inline four diesel engine.
6 cylinder
Your Timing is not lined up properly and/or re-jet your carb.
Over 9,000
The metal disk part of one of the valves (intake or exhaust, usually the exhaust as it is under the most stress in operation) in one of the engine's cylinders has cracked. This allows gasses from the cylinder to escape, causing that cylinder to be "weaker" than the other ones, increasing engine vibration. If the crack is in an exhaust valve (as it usually is), unburned hydrocarbons in the escaping gas will cause the car to fail emissions testing. If the crack is in an intake valve, very hot escaping gas can cause a type of "backfire" in the engine's air intake system.
When heat is applied to a gas contained in a cylinder, the gas molecules gain kinetic energy and move faster. This increase in speed causes the gas to expand, increasing its volume and pressure inside the cylinder. If the cylinder is sealed, the pressure will build up until the gas escapes or the cylinder bursts.
The four cylinder has a throttle body injected gas engine.The V6 and V8 are a multi port injection gas engine.The four cylinder has a throttle body injected gas engine.The V6 and V8 are a multi port injection gas engine.
Is it fuel in jected or carbeurated