Spark Plugs and Check Engine Light A Diagnostic Puzzle Solved

Since ignition coils ignite spark plugs using the current from the car battery, faulty spark plugs can cause the ignition coils to go bad. Brief explanation of causes and conditions of the Check Engine Light Illumination. I'm assuming you do have a turbo car and would like to know how much they charged for spark plug replacement for the numbers I've heard are ... Place the old coil and plug on a metal engine part so that the outside of the sparkplug is touching grounded metal. Start the engine. It will ... Getting check engine light after replacing spark plug ... same thing happened to me. disconnect negative terminal on battery, go smoke a cigarette ... 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. The spark plug wires deliver the spark from the ignition coil to the spark plugs. When the plugs are failing, the spark plug will misfire ... If your spark plugs or spark plug wires are bad or former, you will experience poor performance and reduced power. In some extreme cases, your engine will have ... (1) Defective Spark Plugs or Wires. A malfunctioning spark plug or wire can cause your vehicle to misfire or run erratically, signaling the ... It can even cause a "Check Engine" light. Next, test the ... Baseline parts control fuel delivery and produce high voltage to fire the spark plugs.