On the backfiring, sounds like too lean. This can be a carb problem, as in restricted fuel circuit, vacuum leak, burned out manifold (exhaust heat crossover). If it's been run for an extended time backfiring, the ventura in the carb could be melted.
If the backfiring is a steady popping that increases with throttle, that can be an exhaust valve not opening.
Can also be ignition related, bad plugs, cross wired, carbon tracked cap, bad plug wires, points out of adjustment or bad, condenser bad or loose (if equipped), worn distributor bushings, stuck advance weights, retarded timing.
The vacuum advance that is capped off, I've see that done on industrial engines. It's not really necessary on an engine that runs under heavy load. I think the factory does that for 2 reasons, they didn't want to make a special distributor without one, and they figure it would be short lived, soon fail and become a vacuum leak. You can connect it if you like, I would test it first. It won't make that much difference. If you know the timing specs and have a light, then use them. otherwise just use your ear and judgment, set it where it runs good, starts good and doesn't rattle.
Even the best tuned engine will not run right if the compression is not there. If it idles good, good chance the compression is good. If there is a miss at idle, it's not ignition related, and there are no vacuum leaks, check the compression, look the valve train over, check the backlash in the timing chain.
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 - Restoration Story: Fordson Major - by Anthony West. George bought his Fordson Major from a an implement sale about 18 years ago for £200.00 (UK). There is no known history regarding its origins or what service it had done, but the following work was undertaken alone to bring it up to show standard. From the engine number, it was found that this Major was produced late 1946. It was almost complete but had various parts that would definitely need replacing.
... [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.
