![]() ![]() ![]() We encourage you to consult with a certified technician or mechanic if you have specific questions or concerns relating to any of the topics covered herein. Under no circumstances will we be liable for any loss or damage caused by your reliance on any content. The content contained in this article is for entertainment and informational purposes only and should not be used in lieu of seeking professional advice from a certified technician or mechanic. Learn more about quality spark plugs, find your car part, or find where to buy your auto part today. Here’s a guide for installing new wires if it’s time for replacements. 7,446 Answers The big question is it being fouled with too much fuel or is it an excess of oil Excess fuel would initially cause dry soot to form on the insulator until the build-up becomes so severe the carbon begins to short out the spark and then plug wetting will occur. It’s important to keep an eye on your spark plug wires to avoid subsequent engine issues. Misfires can happen sporadically, intermittently, or constantly on one or more cylinders. If a spark is present, the problem is probably in the distributor cap, rotor or spark plug wires. An engine misfire is when an engine, for some reason, is not achieving complete combustion as the fuel and air mixture fails to ignite inside the cylinder (combustion chamber). Crack the engine and check for a good spark at the spark tester. A decrease in car power, especially in acceleration. If you have faulty spark plugs, your engine will make a rough sound or noise that resembles knocking, pinging or rattling while the engine is running. If your car is experiencing any of the problems listed below, you may have a faulty ignition coil on your hands: Engine misfires. Attach the spark tester to the distributor end of the coil wire. There are several possible symptoms of an ignition coil problem. if RPM's don't decrease noticeably, that cylinder's not making power. cylinder drop test - engine idling, pull then reconnect the spark plug leads, one at a time. spark test - set your tester at 7/16' look for strong blue spark. If you did not see a spark, remove the coil wire from the distributor cap. compression test - you want the lowest to be within 10 of the highest. Weak sparks are orange or red and may be hard to see in daylight. Check the fuel system and/or stark timing. It is almost inevitable that if you own a car, then you have probably experienced engine trouble. If a good spark is present, the problem is probably not in the ignition system. 7 Symptoms of Bad or Failing Spark Plugs. This causes an increase in the voltage required to fire the spark plug, which could damage the ignition coil as well as the spark plug wires.Ī good spark will be blue-white and will be plainly visible in daylight. Vibration damage – Constant wear and tear caused by engine vibration can loosen the electrical connection at the spark plug.The following situations call for immediate replacement of spark plug wires: ![]() Look for any signs of melting or cracking. What to Look Forīe sure to first check spark plug wires for visual damage. In addition, the engine light coming on or visible damange to the cables can be signs of a failing wire. Common signs of failing spark plug wires include a decrease in power, acceleration, and fuel efficiency. This is necessary due to the aging of the spark plug wires from exposure to extreme temperatures (hot and cold), engine chemicals (oil, grease, coolant, etc.) and electrical stresses. We encourage you to consult with a certified technician or mechanic if you have specific questions or concerns relating to any of the topics covered herein. Under no circumstances will we be liable for any loss or damage caused by your reliance on any content.Whether you do a complete tune-up or only change the spark plugs, spark plug wires (also known as ignition cables) should always be checked first. The content contained in this article is for informational purposes only and should not be used in lieu of seeking professional advice from a certified technician or mechanic. However, continuing to drive with fouled or dirty spark plugs can lead to more serious problems that are more costly to resolve. Most problems that are a result of a bad spark plug are relatively easy to fix. If your vehicle is experiencing any of these issues, a trip to your trusted mechanic is in order. You might also feel the vehicle vibrating. A fouled spark plug causes your engine to sound rough while idling. When your spark plugs are performing as they should, your engine sounds smooth and steady. ![]()
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