@halflife103o You can check your spark plugs by removing one of them and see how dirty they are or what shape is in. There are charts everywhere that tell you the condition of the spark plug for example if its coated in oil means bad valves or really brown there is too much in the spark spug, etc...
@halflife103o You can check your spark plugs by removing one of them and see how dirty they are or what shape is in. There are charts everywhere that tell you the condition of the spark plug for example if its coated in oil means bad valves or really brown there is too much in the spark spug, etc...