Spark plug FORD FOCUS and other car parts Ignition and preheating
Ignition coil
Glow plugs
Glow plug relay
Ignition leads
Knock sensor
Plug, spark plug
Engine control unit (ECU)
Engine oil
Top car parts catalogue FORD FOCUS
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 are the spark plugs on the Ford Focus designed for? Where are they located?
These components are used to ignite air-fuel mixture in the combustion chambers of a petrol engine. They convert the high voltage supplied by the ignition coil into an electrical discharge. The parts are installed into special wells located in the cylinder head.
What kinds of components are compatible with my car?
Usually these vehicles are factory-equipped with the parts that have copper, platinum, or iridium electrodes. The first ones are inexpensive but less durable and the gap between their electrodes has the tendency to grow. Due to that, the efficiency of spark formation reduces and it might be difficult to start the engine in cold weather. The components with rare earth elements welded to their electrodes feature a thinner center electrode, which increases the power of the electrical discharge, ensures a quick start and stable engine operation, and improves the fuel efficiency. Electrode tips of this type almost never burn out, which has a positive effect on the service life of the parts.
As a rule, the elements used in these vehicles have one ground electrode. However, there are also multi-electrode items available. They contribute to complete combustion of the air-fuel mixture, which reduces fuel consumption.
Besides, these components vary by the heat rating, thread diameter and length, and the seat type. These characteristics must comply with those specified by the car manufacturer.
What is the lifespan of spark plugs for a Ford Focus?
For the vehicles produced before 2010, the replacement interval is 60,000 km and starting from 2010 it is 45,000 km. However, it is necessary to check the condition of the parts at every routine maintenance.
What are the signs of bad components?
When spark plugs are faulty, the engine can only be started after a long cranking it with the starter or cannot be started at all. One or several cylinders don’t work and the car becomes jerky. The fuel consumption rises while the dynamics falls. The engine vibrates when idling.
