The ignition control module (ICM) is responsible for sending the signal to the coil to fire the spark plugs. If the ICM is not working properly, the coil will not receive the correct signal and will not be able to produce a spark. To check the ICM, you can use a multimeter to test for continuity between the input terminal and the output terminal. If there is no continuity, the ICM is faulty and should be replaced.
2. Distributor Cap and Rotor
The distributor cap and rotor work together to distribute the spark from the coil to the spark plugs. If the distributor cap or rotor is cracked or damaged, the spark can leak out and cause a misfire. To check the distributor cap and rotor, remove them from the distributor and inspect them for cracks or damage. If either part is damaged, it should be replaced.
3. Spark Plug Wires
The spark plug wires carry the spark from the distributor cap to the spark plugs. If the spark plug wires are old or damaged, they can cause the spark to be weak or intermittent. To check the spark plug wires, remove them from the distributor cap and inspect them for cracks or damage. If any of the wires are damaged, they should be replaced.
4. Spark Plugs
The spark plugs are responsible for igniting the air/fuel mixture in the cylinders. If the spark plugs are old or dirty, they can cause the engine to misfire. To check the spark plugs, remove them from the engine and inspect them for wear or damage. If any of the spark plugs are worn or damaged, they should be replaced.
