![]() 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 on-board 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 reveal any codes that indicate a misfire due to a spark plug failure. 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 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 manufacturer's specifications. A flashing engine light could mean that potentially catastrophic misfires are taking place, say our technicians. This can cause your engine to misfire and your check engine light to pop on. In today's cars, say Firestone Complete Auto Care technicians, if a plug starts to fail 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. Changing spark plugs could be a good idea when. ![]() ![]() 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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