1. Spark Plugs and Wires: Check the spark plugs and spark plug wires to ensure they are in good condition and properly connected. Faulty spark plugs or wires can cause misfires and rough idling.
2. Distributor Cap and Rotor: Inspect the distributor cap and rotor for cracks, corrosion, or damage. A faulty distributor cap or rotor can also lead to misfires.
3. Fuel Filter: Check the fuel filter and replace it if it's clogged or dirty. A clogged fuel filter can restrict fuel flow and cause the engine to run lean, leading to misfires.
4. Fuel Injectors: If your Comanche has fuel injectors, you can try cleaning them with a fuel injector cleaner. Dirty or clogged fuel injectors can cause fuel delivery problems and lead to misfires.
5. Air Filter: Inspect the air filter and replace it if it's dirty or clogged. A dirty air filter can restrict airflow to the engine, causing it to run rich and resulting in misfires.
6. Vacuum Leaks: Check for any vacuum leaks in the engine compartment. Vacuum leaks can cause the engine to run lean and lead to misfires.
7. Compression Test: You may want to perform a compression test to check the health of the engine's cylinders. Low compression in one or more cylinders can cause misfires.
8. Timing Belt: Although you mentioned changing the crankshaft sensor, it's worth checking if the timing belt is aligned correctly. If the timing belt is off by even a few teeth, it can disrupt the engine's timing and cause misfires.
If you're not comfortable performing these checks or repairs, it's best to take your Comanche to a mechanic for proper diagnosis and repair.
