When you say "the jumpity jerx," it tells me that it is running rough??? Or just not running right? My suggestions follow..... If no codes, the coils are most likely OK. If you did not replace the boots, I would do that now. There is just too much potential exposure to a ground to take a chance on a leaky boot. Next thing to check is what kind of plugs did your man put in it? If he put in Champions, it will NEVER idle right until you change to a different brand - like Motorcraft or Autolite. Next on the list is the cam position sensor. in >>most<< cases, it will set a code. In some cases, maybe not. The issue here is that on many of the Ford engines, the cam position sensor times the injector sequence, and thus can make it run not quite right. Also, the mass air flow sensor. This one can be off calibration, and will many times NOT set a code in the system. Actually, it will not set a code unless it has a major failure. Otherwise, over time, it may set a rich or lean code. Couple this up with aging oxygen sensors, and it could get to losing a lot of power and efficiency. Now for the "biggie." Fords do have a tendency to flatten out the valve seats. Causes it to run doggy and use too much fuel. The cure is a good 3-angle valve job.
I hope this gives you something to work with. Those 4.6 engines are actually a good runner when they are right.
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 - Earthmaster Project Progress Just a little update on my Earthmaster......it's back from the dead! I pulled the head, and soaked the stuck valves with mystery oil overnight, re-installed the head, and bingo, the compression returned. But alas, my carb foiled me again, it would fire a second then flood out. After numerous dead ends for a replacement carb, I went to work fixing mine.I soldered new floats on the float arm, they came from an old motorcycle carb, replaced the packing on the throttle shaft with o-rings, cut new ga
... [Read Article]
Latest Ad:
1964 I-H 140 tractor with cultivators and sidedresser. Starts and runs good. Asking 2650. CALL RON AT 502-319-1952
[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.
