Each 2015 Ford Focus ignition coil transforms low battery voltage into thousands of volts to activate the spark plugs and start combustion. Rough idling, reduced MPG, and weakened acceleration are common signs of worn-out coils, and problems with these parts can cause a Check Engine Light or starting trouble too.
Like many automotive components, spark plugs don't last forever. A common malfunction is a wet spark plug. According to AA1Car.com, this occurs when the spark plug fails to fire, or fouls out. This can be caused by a number of variables, such as engine flooding, or excessive moisture build up.
Depending on the engine design, there may also be a set of spark plug tube seals or o-rings somewhere in the engine’s cylinder head(s). Anytime the tube seals or o-rings fail, the spark plugs can quickly become oil-soaked. Oiled spark plugs deliver reduced performance and might fail earlier.
Fuel fouled spark plug Black fluffy carbon deposits indicate an overly rich fuel mixture or possibly a weak spark. Check for such things as a stuck choke, a heavy or misadjusted carburetor float, a leaky needle valve in the carburetor, leaky injectors, low coil output or high resistance in the plug wires. Wet spark plug A wet spark plug means
The lifespan of spark plugs can vary depending on several factors, such as driving conditions, engine type, and maintenance practices. In general, F7TC spark plugs can last between 30,000 to 50,000 miles. However, it is recommended to consult your vehicle’s owner manual or the spark plug manufacturer’s recommendations for the specific
A TSB provides special procedures for spark plug removal on these engines. Trying to remove spark plugs from Ford's 3-valve 4.6L, 5.4L and 6.8L 2004-2008 engines can cause part of the plug to break off and get stuck in the cylinder head. The long service interval is actually one of the reasons the plugs break apart.
SfHG. 493 302 158 352 914 354 42 991
ford focus spark plug problems
