Spark Plug Symphony Unraveling the Check Engine Light Connection

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, ... 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 ... So here are some questions: 1. What is the EGR valve and what does it do? 2. What is the condition/color of the old plugs indicitive ... Spark plugs demand accurate measurements for peak performance, and if the spark plug configuration is incorrect, it could possibly cause a check engine light. Dirty spark plugs can cause misfires as partially burned engine oil can prevent the plugs ... Old spark plugs can simply break and fail to produce a spark. 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 ... When you start any vehicle without something plugged in, your definitely without a doubt going to receive a check engine light as the PCM is detecting some ... Yes. If a cylinder is misfiring because the spark plug is not creating a spark, for whatever reason, you'll get a misfire code and the check engine light will ... Getting check engine light after replacing spark plug ... same thing happened to me. disconnect negative terminal on battery, go smoke a cigarette ... It sounds like oil that seeped from the cylinder head into the spark plug tube. A good initial fix (if it's not too bad) is to clean out the plug tube really ...