My son has a 73 Opel GT with a 1975 2.0 liter engine with electronic furl injection. There is one plug only covered with oil. Can anyone speculate as to why this would happen and suggest a course of action?
The plug fouled out due to either no spark or low/no compression in that cylinder.
Remove the plug and hold your thumb over the plug hole and crank the engine. (staying away from the plug wire(s) ) You should feel a pressure when the piston comes up. If you do, check the distributor cap and wire. If there is little or no pressure, there is a problem in the combustion chamber. Either a valve is burnt or out of adjustment due to a bad lifter or worn cam or the piston rings are worn or broken.
A compression tester will check the overall health of the engine. All the cylinders should be within 10 to 20 pounds of each other.
Hi, Got your message and have had my son read it. He changed the plugs yesterday and is going to get a compression tester. He is picking up another Opel today to add to the collection. Sure appreciate you taking the time to offer help.