(800) 853-2651
SHOP NOW

farmall A missing

D

dmiller

Member
I have an A that has started missing on one cylinder. There is spark at the spark plug, I took the valve cover off and the valves for the cylinder (number 3 I think, 3rd one from the front)are moving. (I thought it might be a stuck valve but the necks are moving about the same distance as the other working cylinders.)
Unsure what else to look at. Is it possible that one of the ports for that cylinder could be plugged with something????
The tractor runs the same wether that cylinder has a plug wire to it or not so something is up with that cylinder.
 
I would try a different plug or swap one from a working cylinder. Then make sure the valves are closing for that cylinder by checking the tappet clearance.

If nothing has shown up by that time, you should run a compression test on that cylinder. You can rent a tester at an auto parts store.

I doubt if something is plugged leading to just that cylinder.
 
THere's exceptions, but no change after pulling a plug wire only confirms that spark is or is part of the problem. If the old plug is badly fouled but the new plug improves things, then there may still be something to look at as a source for the fouling.

First try changing that plug.
 
Just because the valves open and close does not mean they gap is correct and that needs to be checked and or adjusted. Also just because a plug has spark does not mean it will fire like it should in the cylinder. I would check the valve tappet gap since you have the valve cover off any how and also try a new plug in that cylinder. I might also swap a plug wire from one of the other cylinders and see if the miss follows the plug wire, oh and you can do that with the plug also
 
You must log in or register to reply here.

Similar threads

S
300 U loader valve ?
Replies
15
Views
388
Shelbygt
S
C
Rough running Cub
Replies
4
Views
280
rustred
rustred
A
Ford 861D timing
Replies
3
Views
196
used red MN
U
T
Steering Question on a Case-IH 895.
Replies
8
Views
333
Texasmark
T
A
Super C
Replies
10
Views
319
ajhbike
A
Tractor Parts Tractor Manuals

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.

Copyright © 1997-2024 Yesterday's Tractor Co.

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.

Yesterday's Tractors - Antique Tractor Headquarters
Website Accessibility Policy

Back
Top