It could be due to a defective sensor, a bad ignition coil or something in the fuel system. Yet, this is another one of those problems that can be due to any ignition system part. It could also feel rough as the engine tries to push out more power. The car may seem sluggish when you push on the accelerator pedal. Rough AccelerationĪs the spark plugs fail, you will notice several issues with the acceleration. You may feel the vibration as the idle gets rougher. However, when the plugs start to fail, the idle becomes rough. When everything is running as it should, you will see a consistent idle from your car. Normal car idle occurs between 600 and 1,000 RPMs. If you allow the engine to continue misfiring, it will lead to further damage. The misfiring condition creates sputtering and it feels like the engine is struggling to perform. It can occur any time that a sensor fails or if a spark plug is defective. Misfiring EngineĪ misfiring engine occurs because the ignition system is enduring too much stress.
BAD SPARK PLUG SYMPTOMS WEED EATER CODE
Instead, you need to check the diagnostic trouble codes with your scanner and reference them in our online code library to see what’s going on.
You can’t assume that the spark plugs are bad simply based on this warning light. Keep in mind that the Check Engine Light comes on for a multitude of problems. You should stop driving immediately and fix the problem. If the Check Engine Light begins flashing, it may indicate that a spark plug has failed, leaving one or more of the cylinders inoperable. The light can also come on if the spark plug becomes contaminated with oil or starts to run too hot. Therefore, the Check Engine Light will come on when relevant codes are set in the system. When the spark plugs are bad, the air-fuel mixture may not combust as it should. Here are the symptoms that matter the most. Defective plugs can also lead to a misfiring engine, a rough idle, trouble accelerating, a hard-starting engine, decreased fuel economy and exhaust that smells like fuel. If the Check Engine Light is flashing, the spark plugs may be bad. Finally, we end our article with the cost of spark plug replacement and with some answers to your questions. We also explain the function of the spark plugs, show you the location and give you tips to test them. In this guide, we cover the top symptoms of bad spark plugs. Replacing them is part of your car’s recommended maintenance schedule, but it’s still helpful to know the most common bad spark plug symptoms. Spark plugs are an essential part of the ignition system in a gas-powered car.
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