Can worn piston rings lead to carbon fouling on spark plugs?

Jun 13, 2023 ... I have 1 cylinder in my 1970 440 that carbon fouls, almost positive its a valve issue. All other plugs still look great. (Bosch Platinums). A poorly performing fuel pump can cause spark plugs to foul. The plug will have a dusty layer of black carbon deposits. Jul 14, 2021 ... Common types of fouling include lead, carbon, silica, loose debris, and oil. Another common cause of spark plug failure is a cracked ceramic ... ... spark plugs when you accelerate the next time (with OIL). A fouled, or carbon-fouled SPARK PLUG will NEVER cause a fault or warning horn. Secondary ignition ... Feb 28, 2014 ... Years ago I thought a plug fouled was because of the carbon and lead build up. ... cause of sparkplug fouling is oil getting into combustion ... It only took one change of spark plugs about 30 hours ago. Some ... A "weakness" in the ignition system will cause cause either a comeplete shut ... Jan 31, 2020 ... Gentlemen, I have a sooty, carbon-fouled spark plug problem that I ... carbon building up on the exhaust valves causing them to leak. Mar 20, 2023 ... ... cause... The ... I would not make any change to jetting based on a random look at a spark plug. Yes, there is some carbon on the plug ... Jul 4, 2016 ... Boat: 2001 Sunsetter Lxi, Engine: Indmar 5.7L 325 Monsoon, Hours: 200+. Upon changing spark plugs, discovered 2 out of 8 plugs are fouled. Jan 29, 2014 ... No more fouling of number 2 and the engine runs better then it ever did. Still puzzled about why only one spark plug fouled. Check out the carb.