![]() Luckily for most people spark plugs have long life cycles of about 80,000 miles. You can review your car’s unique maintenance schedule to know when they recommend replacing your spark plugs. Like most other engine maintenance issues, it’s best to refer to your Manufacturer’s Suggested Maintenance Schedule. You might even find your fuel efficiency reduced by up to 30 percent, according to the National Institute for Automotive Service Excellence. This happens because the engine becomes less and less capable of efficient combustion and needs more gas to run, meaning you’ll be shelling out more money in the long run. ![]() When an engine has bad spark plugs it will consume more and more fuel. If they aren’t functioning properly, you can quickly notice how much more money you’re spending on fuel. If you start to notice that your car is going through gas quicker and quicker, you could be facing faulty spark plugs in your engine. No one ever wanted to spend a fortune at the gas station, and gas mileage is one of the most important factors for buyers choosing vehicles today. If you notice that it isn’t as responsive to your foot on the gas pedal, you might be looking at worn-out or damaged spark plugs. If you don’t have problems with starting your car or don’t notice any issues when it’s idle, you might notice that it’s much harder to reach higher speeds when your engine has bad spark plugs.Ī faulty spark plug might cause an engine to perform sluggishly and could make acceleration difficult for you. ![]() If your spark plugs are working properly, your engine shouldn’t make any strange noises it should sound steady and smooth. You might even hear a knocking noise to feel the car visibly vibrating when the spark plugs are faulty. Weather conditions like excessive coldness and wetness can also exacerbate the issue. If you hear your engine pinging or rattling while you’re stopped at a red light, faulty spark plugs might be the culprit.ĭelayed sparks from bad spark plugs make it much more difficult for your engine to idle as it was designed, especially when it’s been parked for more than a few hours. 3) Rough Engine IdlingĪn engine that is running well will purr quietly when your car is idled. If the combustion process in your engine is affected by faulty spark plugs, they will cause a significant loss of power for the engine and make it impossible to experience a smooth ride in your car. ![]() Misfires happen when one or more cylinders in a car’s engine are not producing the necessary combustion power for it to run. 2) Motor MisfiresĮven if you can get your car started, bad spark plugs can hinder your engine performance and cause it to misfire or hesitate while running. If the car cannot start at all, this is usually a symptom of a bad battery. Busted spark plugs might make your car stall when you try to put the key in the ignition. When this happens, your car can have trouble starting. ![]() If even one of your spark plugs is faulty, it can make it difficult for all your car’s cylinders to fire at once. When you have trouble getting your car started after it has been sitting for a while you could be dealing with bad spark plugs. Here are a few more detailed symptoms of bad spark plugs you might experience if you need to replace the ones in your car. Your check engine light will turn on when you have faulty spark plugs, but that warning could point to lots of potential engine trouble.
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