Spark Plug Diagnostics Unraveling the Mystery of Fouled Plugs

I suspect low mileage and low temperature running is what is causing this. A good high load run would probably clean up the fouling. Find the ... a fouled spark plug is when it isn't burning the fuel cleanly, usually leaving wet oilly deposits of the plug, thus causing it to misfire even ... Internal coolant leaks can foul a spark plug and cause a misfire. The problem could be a leaking intake manifold or a head gasket, and the ... Some of them had some white residue on the diodes. I think thats normal, or could be from putting seafoam and injector cleaner through it a couple times. A fouled spark plug may be an early sign that a head gasket is starting to leak. The cheap fix here wold be to add a bottle of cooling system sealer or head ... Spark plug fouling is essentially a spark plug becoming too worn, dirty or contaminated to work. If a runup "burns off" fouling, it is most certainly oil or carbon. Lead fouling will not usually burn off, as lead oxide has a very high ... He noticed spark plug #1 was fouled & swapped from #1 to #4 cylinder and it triggered it there too, so decided to change all of the spark plugs. Is your spark plug misfiring? It may be a result of fouling. Shop great deals for NGK Spark Plugs at Sparesbox, http://bit.ly/2cdZTvr Learn ... Aging spark plugs will cause abnormal engine vibration. Pay attention to replacing them after using them for a long time#driving # ...