Once in a while the car won’t even attempt to start. All you hear is a click, then one or two more tries and the car starts. When idling the knocking can be heard, or when i push the gas the knock can be heard. I was once told it could be that the spark plugs are going bad and it is causing a issue with the pistons. Any one have an idea as to my issue. Every so often the knocking will go away completely. Also with the car not staring it is not like you hear the car try to start, it is just a click and nothing else.
New here so please advise if i can improve question.