- Leaking spark plug gasket: The gasket that seals the spark plug to the cylinder head may be worn or damaged, which can allow water to seep into the cylinder. This can cause the spark plug to misfire, leading to a skipping engine.
- Cracked cylinder head: A crack in the cylinder head near the 4th spark plug could also allow water to leak into the cylinder. This is a more serious problem than a leaking spark plug gasket, as it can lead to engine overheating and other damage.
- Blown head gasket: If the head gasket between the cylinder head and the engine block is damaged, it can allow water to leak from the coolant system into the cylinders. This can cause the engine to misfire, skip, and overheat.
- Leaking water pump: If the water pump is leaking, it can drip water onto the spark plugs and cause them to misfire. This can also lead to a skipping engine.
To diagnose the exact cause of the problem, it is best to have a qualified mechanic inspect the vehicle. They will be able to identify the source of the leak or damage and recommend the appropriate repair.
