Your Website. Save my name, email, and website in this browser for the next time I comment. This site uses Akismet to reduce spam. Learn how your comment data is processed. Summit Racing Equipment. During his year career in the auto industry, he has covered a variety of races, shows, and industry events and has authored articles for multiple magazines.
He has also partnered with mainstream and trade publications on a wide range of editorial projects. In , he helped establish OnAllCylinders, where he enjoys covering all facets of hot rodding and racing. Matt says: September 1, at am. Currently using Taylor plug wires. This is for a demolition derby application. Let me know if you have any questions. Joe BUsuttil says: April 26, at am. Dewayne says: October 10, at am. Luke says: January 8, at am. Also, on newer vehicles that were factory-equipped with long-life platinum , mile spark plugs, if it is time to change the spark plugs and your engine has a distributor or DIS or Coil-Near-Plug COP ignition system with plug wires , it is a good idea to replace the plug wires too.
A shorted plug wire or grounded spark plug will cause a drop in the firing voltage when the ignition pattern is observed on a scope. The engine will also have a steady misfire in the affected cylinder. Another trick for finding weak spots in the wire insulation is to rub a grounded probe along the length of each plug wire while the engine is idling.
If you suddenly get a misfire or see arcing, it indicates a crack or leak in the plug wire insulation. Replace the wire. When one cylinder shows a higher firing voltage than the others on a scope, and a shorter spark duration, high secondary resistance is indicated.
High secondary resistance may be caused by bad plug wires, or by worn spark plugs or a lean fuel mixture dirty injectors or an air leak. To further isolate the cause, the KV kilovoltage demand for the affected cylinder should be compared to the other cylinders. But if the firing voltage is roughly the same as the other cylinders, the most likely cause is high resistance in the plug wire or spark plug. Replacement spark plug wires are usually sold in complete sets for four cylinder, six cylinder or eight cylinder engines.
You should buy the highest quality plug wires for your engine so they will fit and perform the same as or better than the original plug wires. If you have an older vehicle with carbon core or fixed resistor style plug wires, consider upgrading to mag plug wires for improved durability, longevity and performance.
Spark plug wires come in different lengths. When you open the package compare the lengths of the new plug wires to the original plug wires on the engine to make sure they match and which wires go to each spark plug. Replace each wire one at a time to avoid mixing up the firing order very important! Start with the longest plug wire s and go to the shortest or vice versa.
If you mix up the firing order, the engine may not start or it may pop and backfire. This may damage the engine so always double-check the firing order if you are unsure. Refer to the firing order in a service manual or markings on the intake manifold, plug wires or distributor cap if used. Prolonged contact with engine hot parts could result in development of cracks in the insulation layer of spark plug wires.
Was everything okay with your spark plug wires? In that case, it might be a problem with another part of your ignition system. Read our blog to see which ignition parts you can replace yourself, and which are best left to the experts. Champion offers a wide range of quality spark plug wires with different resistances and in a variety of lengths.
Explore our range here. 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. 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.
Related articles. How easy is it to change ignition parts? Read more. Spark plugs vs glow plugs. However, this also depends on the kind of driving you to do. But if you race cars or take your vehicle off-road, you may want to consider changing out the wires sooner.
0コメント