Spark plug FORD FIESTA and other car parts Ignition and preheating
Ignition coil
Glow plugs
Glow plug relay
Ignition leads
Distributor cap
Knock sensor
Distributor rotor
Ignition distributor
Ignition module
Plug, spark plug
Engine control unit (ECU)
Repair kit, distributor
Engine oil
Top car parts catalogue FORD FIESTA
Brake discs
Shock absorber
Brake pads
Control arm
Clutch kit
Oil filter
Turbo
Wheel hub
Wheel bearing
Air filter
Brake caliper
Lambda sensor
Timing belt kit
Coil spring
Fuel filter
What does the marking on spark plugs for the Ford Fiesta stand for? What parameters does it contain?
These vehicles are factory-equipped with Motorcraft components produced by one of the car manufacturer’s subsidiaries. They have their own marking system where each symbol has a particular meaning:
Thread diameter.
Seat type and size.
Availability and type of the resistor.
Heat rating.
Configuration of the central and ground electrodes.
Additional features.
Most components are produced in collaboration with renowned manufacturers of ignition systems such as Bosch, NGK, Denso, Beru, Champion, and others. Their marking is usually applied on the surface of the part next to the Motorcraft logo. For example, the components for the MK6 (2008, 1.4 L engine) version have two codes: FoMoCo AYFS22CB and Bosch HR8MEV. A detailed explanation of each symbol can be found on the manufacturers’ official websites or online catalogues.
What elements do spark plugs for the Ford Fiesta consist of?
The main elements of the components in these vehicles are:
Terminal.
Shell.
Insulator with corrugations which prevent flashover.
Internal packing.
Interference suppression resistor.
Gasket.
Centre electrode with a copper core, and a ground one.
The design of the component might vary depending on the production year and version of the vehicle.
Is it possible to detect faulty spark plugs on a Ford Fiesta by their outer appearance and colour of the deposits?
The manufacturer recommends examining the components at every routine service. This will allow detecting any engine malfunctions easily. For example, a glossy tip or absence of any deposits on it are the signs of a too high heat rating or lean air-fuel mixture. A thick layer of soot on the tip and the inner insulator indicates a too rich air-fuel ratio. An oily film might be a symptom of worn piston rings, valve guides, or valve stem oil seals.
