An engine running to lean usually has too much air entering the mixture.
Normal spark plug deposits are typically light tan or brown in color.
To make your life easier, invest in the best spark plug tool socket to pull the plug out.
Badly worn piston rings, broken or cracked piston rings, grooves or scoring in the cylinder walls, or even piston rings that have been installed upside down can allow oil to get into the combustion chamber and foul the spark plugs.WET spark plugs, wet spark plugs means the spark plugs are not firing.More Ignition Articles: Why Spark Plugs Need to be Replaced Spark Plug Technology Ruthenium Spark Plugs Bosch Platinum 4 Spark Plugs Don't Neglect the Spark Plugs Original Equipment Spark Plugs, Are They Best?Both conditions can create poor starting and misfiring.Oil will form heavy black wet oily deposits on the spark plugs.If your spark plugs are fouled and misfiring because you have been driving your vehicle infrequently, or you have only been driving short distances (only a few jackpot city mobile casino australia miles per trip or you have been letting your engine idle for long periods of time (15 minutes.If you have a modified performance engine, however, you might want to install spark plugs that are one heat range colder than the standard spark plugs that are specified for your engine.Appearance Symptoms: The insulator around the center electrode may be broken (see left) or the ground electrode may be bent.The "heat range" of the spark plug determines its operating temperature and its built-in fouling resistance.Some runescape roulette common causes of spark plug fouling include: Worn or damaged valve guides or valve guide seals.But melting may also indicate unusual heat or hot spots within the combustion chamber.Most spark plugs are pregapped, but the gap may not be correct for your engine application.When the engine is running, the ceramic shell that surrounds the center electrode gets hot and helps to burn off any fuel or oil ash deposits that might otherwise foul the spark plug.Again, you will likely experience misfire and some power loss under these conditions.Appearance Symptoms: The electrodescenter and groundare covered in an ashy coating.The appearances of the spark plug will alternate between all the engine running factors.If you end up breaking a spark plug that falls into the cylinder, you can be in trouble.
Appearance: A light tan/gray or brownish color, along with very little electrode erosion, indicates optimal operation conditions, including a healthy engine and correct spark plug heat range.
Spark plugs are designed to be self-cleaning up to a point.
By using a simple wire brush to remove carbon deposits, go for a long drive, wait for the engine to cool down and remove them.