Spark plug wires (also called "ignition cables") carry high voltage current from the ignition coil(s) to the spark plugs. On older engines with distributors, the wires run from the distributor cap to the plugs, and come in different lengths to reach the closest and furthest spark plugs. Th...
The voltage produced can reach tens of thousands of volts, and travel to the spark plugs through spark plug wires. As the high voltage jumps the spark plug gap, it ignites the air-fuel mixture within the cylinder, starting the combustion process. This is basically what happens when we turn...
You can measure the resistance of the spark plug wires with a digital multimeter to see if they are working properly. Each foot of a wire should have a resistance of 10,000 to 15,000 ohms. A higher resistance indicates bad wiring. Even a hairline rupture somewhere can cause a total failu...
If you let your spark plug wires go for more than 30,000 miles without being changed (and even sometimes if you don't), they can be difficult to remove. The constant heating and cooling of the engine every day can cause the rubber to stick to the spark plugs or the distributor electro...
To find the plugs, simply locate the wires and follow them. There's usually only one plug per cylinder, but they fire in a specific order set by the manufacturer. Pick one plug to start with and gently remove only that wire. Changing one spark plug at a time is a lot easier than re...
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The plug also has to withstand the extreme heat and pressure inside the cylinder, and it must be designed so that deposits from fuel additives do not build up on the plug. Spark plugs use a ceramic insert to isolate the high voltage at the electrode, ensuring that the spark happens at ...
If this continues, the wires can overheat and start a fire. The circuit breaker's job is to cut off the circuit whenever the current jumps above a safe level. In the following sections, we'll find out how it does this. Breaker Design: Basic The simplest circuit protection device is ...
You can leave the spark plug wires for later. Step 5: Remove the bolts that attach the transmission’s bell housing to the engine Jack up the car and put it on jack stands, then support the transmission from underneath with other jack stands. It’s very important to use some support ...
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