What will bad plug wires do




















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And thanks for reading Autoblog. Decrease in power, acceleration, and fuel efficiency One of the most common symptoms of an issue with the ignition cables is engine performance problems. Check Engine Light comes on Another symptom of a potential issue with the ignition cables is an illuminated Check Engine Light.

Visible wear or damage to cables Visible wear or damage is another symptom of an issue with the ignition cables. Ownership ignition system. View More. Thank You Thanks for subscribing. Check your in-box to get started. Sign Up More Info. We notice you're using an ad blocker. Here are the 11 signs of bad spark plug wires to take notice of then you are ready to change your plug wires. Mind you, in some case it not just be a bad wire. Mileage is a number of miles covered. A good spark plug and wires in good conditions can cover much distance s , but with a bad spark plug wire, your journey can be shortened.

When your car refuses to start, it might not a battery fault but, a bad spark plug wire. Hard starts is one of the most common bad spark wire issues. Bad plugs can also drain the battery, stopping the engine from picking up. If you are certain it is not a battery issue, then you should replace the spark plug as soon as possible.

Engine misfiring is one of the known symptoms of a bad spark plug wire in a car. This usually occurs when there is incomplete engine combustion. Engine misfires, because the cylinders are not working or firing fine. With a bad spark plug, the vehicle will halt and continue. When the spark plug wire is bad, it will cause an erratic flow of electrical current to the engine. Next signs of bad spark plug wires are slow acceleration.

A poor acceleration is a quick way to tell you that the spark plug wire is faulty. All you need to is to change the spark plug. Rough engine idling is also an electrical issue that develops when the spark plug wire is bad. It is also a common symptom that needs an urgent replacement of your spark plug.

A bad spark plug wires can affect the smooth flow of electrical current which can cause a rough engine idling. Poor fuel economy in a car is a worrisome situation.

There could be other reasons like a catalyst issue. But, a bad spark plug wire is a suspect. When the spark plug is bad, the fuel economy decreases due to incomplete combustion. Get a new spark plug and the fuel economy will be back to normal. A reduced engine power fault is a result of a cut or break in the spark plug wire. When this happens, the engine will not function optimum, or it may not even start at all.

For this reason, the electrical current could be completely stopped or experience brief spurts when transmitted to the spark plugs. This phenomenon causes engine surging, which is not good for the overall health of the vehicle. All the symptoms of bad spark plug wires ultimately result in an underperforming engine. Cracked damaged wires impede the regular flow of electrical current to the spark plugs, causing a massive loss of engine power.

Driving Tips. Maintenance Tips. Car Review. Car Comparison. Industry knowledge. Last updated Jan 15, When the wires fail, a number of engine-related problems will arise, including the following: Rough Engine Idling The engine spark plugs get the required electrical power through the plug wires.



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