Distributor Caps and Rotor Arms
On older models of vehicle’s, these small parts play such a crucial role. Although simple by design, if there is a problem with them, they will make an engine run roughly and it won’t burn fuel efficiently.
A rotor arm spins inside the distributor cap, and two metal contacts come into almost contact with each other, and from here, the spark shoots down the ignition wire to the spark plug. If the gap becomes too wide, or there is a fault in the two pieces, these sparks can become intermittent, and fuel passes through the engine without being burned.
Ignition Wires and Spark Plugs
If the contacts don’t touch correctly, or there are broken wires, the sparks can’t travel along the cables to create a spark in the spark plug.
When the power reaches the spark plug, there is a small gap where another spark is created to ignite the fuel. Spark plugs wear over time, and this gap gets wider. If this happens, the chances of a good spark are vastly reduced.
This again means gasoline is passing to the engine and not being ignited, and the vehicle will misfire.