COOLING SYSTEM LEAK. A5: Rough idling can be caused by various factors, including dirty or faulty spark plugs, clogged fuel injectors, vacuum leaks, problems with the idle control valve, uneven compression in the cylinders, and faulty ignition coils or wiring. Have a qualified mechanic inspect your engine to identify the specific cause and perform necessary repairs or replacements. More information https://telegra.ph/The-Thrill-of-Ten-Exploring-Cars-with-V10-Engines-05-31 Overall pre-care is the best care. If you choose only one product it should be a waterproof spray. The invisible barrier created against the elements is your first line of defense. Although car cooling systems are designed to maintain a fairly constant working temperature, the actual engine temperature can vary for a number of reasons. It may even reach such a high level that engine damage becomes a possibility. How Deposits and Sludge Form Inside an Engine. 3. Use Good And Protected Gas Tank Doors. The valve cover sits above the spark plugs. When the gasket fails and allows oil to leak onto the car’s spark plugs, fluid can get into the openings. As oil builds up, the spark plugs cannot work properly and foul out.