Tom said: "I installed a new set of plugs and wires"
That would have been my first plan too. But it didn't fix it...
Several good theories here, John T is correct with the voltage increase being able to fire a simi-fouled plug, but the plugs are new...
Take a look at the plug that is misfiring:
Possibly the new plug is defective, switch it with another plug, see if the problem follows.
Take a look at the plug, is it gaped properly?
Is it already fouled? Bridged with a piece of carbon? Oil splashed? Coolant? Possibly there is a problem with the cylinder (hopefully not, this is just an idea). If that cylinder was run dead for a while, it may have carboned and oiled up the combustion chamber. Once it started hitting again the carbon and oil were splashed on to the new plug. If the head gasket is leaking the plug may be getting water on it, grounding it out. If it is already oil fouled, try installing a non-fouler on that cylinder temporarly to get it cleaned up. Then maybe it will be ok once it's dried up, but there is a posibility there is a compression/oil control problem.
Still a possibility the cap is cracked, leaking voltage to ground or between terminals.
Upload one or more videos to your post. Photo filesizes should be less than 300K and Videos, less than 2MB. Formats allowed are gif, jpg, png, ogg, mp4, mov, and avi. Be sure to use filenames without spaces or special characters, and filetypes of 3 digits lower case.
We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]
Today's Featured Article - Listening to Your Tractor - by Curtis Von Fange. Years ago there was a TV show about a talking car. Unless you are from another planet, physically or otherwise, I don’t think our internal combustion buddies will talk and tell us their problems. But, on the other hand, there is a secret language that our mechanical companions readily do speak. It is an interesting form of communication that involves all the senses of the listener. In this series we are going to investigate and learn the basic rudimentary skills of understanding this lingo.
... [Read Article]
Latest Ad:
2022 John Deere 5045E, 4wd, front end loader and 3rd function with grapple. 120 hrs, 55k new, must sell
[More Ads]
All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy
TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.
