* Cause of Fouling: Fouled spark plugs are usually caused by issues like:
* Excess fuel: Rich fuel mixture, possibly due to carburetor issues, fuel injectors, or faulty oxygen sensor.
* Oil buildup: Worn engine components allowing oil to enter the combustion chamber.
* Incorrect spark plug type: Using a spark plug with the wrong heat range.
* Treatment Focus: Restore engine treatments are typically designed to clean engine deposits, improve combustion, and potentially improve fuel economy. They don't directly address the root cause of spark plug fouling.
What to Do Instead:
1. Identify the Cause: Determining the cause of the fouled plugs is crucial.
2. Replace Spark Plugs: Start by replacing the fouled plugs with the correct type for your vehicle.
3. Address Underlying Issues:
* Fuel System: If fuel is the culprit, investigate and repair carburetor/injector problems, check the fuel pressure, and ensure the oxygen sensor is functioning correctly.
* Engine Oil: Address any excessive oil consumption or oil leaks.
* Combustion Chamber: Inspect the combustion chamber for excessive deposits or carbon buildup.
Important Note: While engine treatments might help with general engine maintenance, they cannot solve a specific problem like fouled spark plugs. If you have a fouled spark plug issue, it's best to diagnose and address the root cause to prevent further problems.
