As electrodes on your spark plugs wear out over time, the voltage needed to bridge the gap and ignite the fuel grows substantially. This can cause the engine to resist starting or even fail to start at all. Changing your plugs will ensure that your engine operates at an optimum level and your ignition system continues to function properly.
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Things you need
- Wire brush
- Ratchet and socket set
Open the bonnet of your 2000 Ford focus and locate the spark plugs on the back and front sides of your engine. Pull the spark plug wire directly off the spark plug. A gentle pull should pop it right off. Then trace the wire to its other end at the ignition coils and use the same pulling motion to remove the wire completely.
Replace only one spark plug at a time to avoid mixing the wires up and creating engine problems by having the wires firing off in the wrong locations.
Use a ratchet and socket set to unscrew the spark plug using a counterclockwise motion. Use a wire brush to remove any debris inside the spark plug boot.
Insert the new spark plug into the boot and screw it in with your hand as far as it will go. Use your ratchet and socket set to tighten it into place.
Replace the spark plug wire by snapping it into place at its endpoints in the ignition coil and the spark plug. Repeat this process for the remaining plugs.
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