What are the properties of copper, nickel, platinum, and iridium used in spark plugs?

Sep 1, 2020 ... ... caused the engine to run really rich, which ultimately caused the carbon-fouled spark plugs. Does this sound at all plausible? I don't know ... 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. Nov 12, 2020 ... The most common reasons why a lawn mower spark plug fouls are listed below: Air Intake blockage (this could be caused by the choke being left ON ... ... 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 ... Dec 15, 2008 ... And if the O2 sensor was bad, would that even cause it to be hard to start? The carbon fouling could have happened due to the plugs firing ... Jun 25, 2013 ... Carbon fouling occurs when the spark plug firing end does not reach the self-cleaning temperature of approximately 450°C (842°F). Carbon ... Jul 10, 2003 ... Dry black carbon deposits could be an indication of a rich mixture ... More than a quart in 1000 miles is cause for concern in my book. Dec 29, 2005 ... These assume that you're getting carbon or fuel fouling on the plug (which are dry, sooty deposits - if wet, they smell of fuel.) Oil fouling ... May 12, 2006 ... ... carbon, fuel, oil or other deposits; Will cause spark to leach to metal shell...no spark across plug gap will cause a misfire; Wet-fouled ... May 30, 2014 ... ... plug solid with dirt causing a rich running condition fouling the plug. ... 2005 EZ GO ST fouled spark plugs, Gas EZGO. carbon fouled plug, Gas ...