Spark Plugs and the Check Engine Light A Diagnostic Adventure

Bad spark plug wires can also cause your check engine light to come on. Battery Issues. Your vehicle's battery is another important component of engine function ... Spark plugs: ... Old spark plugs and wires can reduce the performance of your car and cause your fuel economy to decrease. When these need to be replaced due to ... A defective, old or dirty spark plug can cause the engine to misfire. If your check engine light is constantly flashing, please contact our team of automotive ... Until then, the systems are "not ready" and do not throw a DTC, nor will the MIL be lit. Bad plugs or wires would cause some sort of misfire, ... The answer is - yes! Worn spark plugs can cause your vehicle's check engine light to illuminate, indicating an issue. It may even be a flashing ... If the plug wires are OEM and you have not upgraded changed them since - never - then you can also see how the wires can show a loss in the ... This explosion is what moves the pistons and makes the engine run smooth. The spark plug wires deliver the spark from the ignition coil to the spark plugs. If ... You probably did not properly torque the new spark plugs. If they are even a little bit too loose you will get a check engine light after a few days of driving. Worn Spark Plugs - If your vehicle is misfiring, it is probably due to old spark plugs. Overheating Catalytic Converter - A strained ... Your spark plugs create a hot spark that ignites the air-and-fuel mixture in the cylinder, allowing your engine to start and run. Faulty spark plugs or spark ...