![]() "A misfiring spark plug can reduce fuel efficiency by as much as 30%," reports the National Institute for Automotive Service Excellence. Worn out spark plugs can increase your vehicle’s fuel consumption because they won’t effectively burn the fuel that goes into the engine, meaning you’ll be shelling out more money on fill-ups. If your spark plugs are on their last leg, they’ll take it out on your gas mileage. ![]() The battery is most likely the culprit if your car has no power and won't start at all. If your car stalls when you are trying to turn it on, there could be a problem with spark plugs or damaged spark plug wires. Your spark plugs have one of the most important jobs in your vehicle, which is to provide the spark that powers the engine! Old, worn out spark plugs have a harder time creating the spark that actually powers your engine. Since our facilities provide complete auto care, our technicians also have the proper tools and expertise in engine control systems, sensors, and onboard diagnostics to perform an advanced diagnostic and provide an accurate repair estimate. That's one reason your local Firestone Complete Auto Care offers Code Scans, which can reveal codes that are related to the issue at hand. Note that a check engine light could be potentially caused by a number of things, not just a spark plug problem. ![]() Symptoms of misfiring spark plugs may include rough idling, uneven power when accelerating, and an increase in exhaust emissions. This can help save you from costly repairs, as driving with misfiring spark plugs could put undue stress on your car's catalytic converter (the engine's exhaust cleaner). In general, it's best to replace spark plugs as part of preventative maintenance based on the manufacturer's suggested maintenance schedule. A flashing engine light could mean that potentially catastrophic misfires are taking place, which could damage the catalytic converter(s). This can cause your engine to misfire and your check engine light to pop on. In today's cars, if a spark plug fails and can no longer ignite the air-fuel mixture, then the most obvious event should be the check engine light coming on or even flashing. Worn/failed spark plugs, coil packs, or spark plug wires can trigger your check engine light to come on. It’s important to spot the signs of bad spark plugs early and replace old plugs to keep your engine working at its best. But over time, like any auto part, spark plugs can wear out. The combustion process, burning fuel with oxygen, is what powers the engine.īecause spark plugs bring power to your engine, they have sway over your car’s engine’s performance, efficiency, and even emission levels. Only about the size of a finger, spark plugs take in high voltages of electricity and use it to ignite the air-fuel mixture in the combustion chamber. They screw into the cylinder head that sits at the top of the engine. Spark plugs are an insulated plug that are an important part of a vehicle’s internal combustion engine. What Are Spark Plugs And What Do They Do? Learn why it’s important to keep this part of your car in great working order and when to change spark plugs by watching for these bad spark plug symptoms. Old or faulty spark plugs could be the culprit! After all, these small spark plugs have a big job to do. While this certainly could be the case, it’s not the only possibility. Many drivers assume that when their car has trouble starting, there’s a problem with the battery.
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