Welcome! Please use the navigational links to explore our website.
PartsASAP LogoCompany Logo (800) 853-2651

Shop Now

   Allis Chalmers Case Farmall IH Ford 8N,9N,2N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver

Attention Forum Users: On the 28th of December 2023 at 9:00am Central Time, we will be taking the forums down for maintenance while we prepare the new forums for your use. Please click here for more information.

Allis Chalmers Discussion Forum
:

D15 gas running rough

Welcome Guest, Log in or Register
Author 
gitoad

02-02-2006 14:02:33




Report to Moderator

Help! D15 gas started running rough last summer. I change and gapped the plugs to .025. I changed the pts, gapped them at .022 and changed the condenser. It idles fine, starts perfect but once it warms up runs rough with an occasional backfire when given her the gas. Carb adjustment seem ok as when I change them the tractor runs worse so I left them where they were when it was running fine. I have let it idle fast and pulled off each plug wire and each one makes a difference when pulled off. It runs worse as I put a load on it. Where do I head next?!!

[Log in to Reply]   [No Email]
gitoad

03-12-2006 12:57:46




Report to Moderator
 Re: D15 gas running rough in reply to gitoad, 02-02-2006 14:02:33  
Put on a new distributor cap today. Starts right up but still does not run smooth under load. No longer back fires. When I pull off 3rd plug wire from the front at high idle engine does not run too much worse than when it is on. I have put penetrating oil into the plug hole, replaced the plug and it starts right up and burns the stuff out but no improvement. I am going to try atf as suggested with the idea it is a stuck valve. Is there a sure fire way to check? Maybe with a compression guage?? As always your guidance is appreciated!

[Log in to Reply]  [No Email]
Dan Musil

02-05-2006 08:34:25




Report to Moderator
 Re: D15 gas running rough in reply to gitoad, 02-02-2006 14:02:33  
You could have a valve sticking probably a ex.Try removing intake hose and squirt in some
atf with eng at hi idle,somtimes that works.



[Log in to Reply]  [No Email]
Arthur DeJager

02-04-2006 17:16:47




Report to Moderator
 Re: D15 gas running rough in reply to gitoad, 02-02-2006 14:02:33  
Make sure the centrifigal advance weights are operating properly and the springs are not broken (in the distributor). Check or replace the plug and coil wires. Make sure there are no restrictions in the fuel and air flows. Keep at it. You'll find it.



[Log in to Reply]  [No Email]
gitoad

02-05-2006 04:11:04




Report to Moderator
 Re: D15 gas running rough in reply to Arthur DeJager, 02-04-2006 17:16:47  
I have had to order the distributor cap as the local parts stores do not carry ag parts. I appreciate all the replies! I will let you know how I make out when the cap comes!Does anyone know of a reliable place to send a carb(on another tractor) out to be rebuilt?



[Log in to Reply]  [No Email]
Kent of SW MO

02-03-2006 06:13:30




Report to Moderator
 Re: D15 gas running rough in reply to gitoad, 02-02-2006 14:02:33  
If a new cap and bug do not fix your problem try a new coil.

Kent



[Log in to Reply]  [No Email]
old

02-02-2006 15:39:52




Report to Moderator
 Re: D15 gas running rough in reply to gitoad, 02-02-2006 14:02:33  
Just to add to Texas, I agree it could be the cap but if you replace the cap also replace the rotor, either one can cause your problem. It could also be that the carb is running to lean which will also cause it to backfire. Open up the main jet a 1/2 turn at a time and then try it out, if you get to the point that you have black smoke then you have it open just a little to far.



[Log in to Reply]  [No Email]
Texas Denny

02-02-2006 14:41:12




Report to Moderator
 Re: D15 gas running rough in reply to gitoad, 02-02-2006 14:02:33  
It is like going through a swamp. Never know how deep the water is. You've done points (I think gap is 0.015" but 0.020" should work), plugs and condensor. The only other ignition point is the distributor cap. They occasionally develop cracks too small to be seen. Occasionally these cracks are temperature sensitive - cause no problem when cold but cause backfiring, etc when warm.

Carbs can cause problems as well if the needle and seat allow leakage. But I think backfiring suggests the dist cap.

[Log in to Reply]  [No Email]
[Options]  [Printer Friendly]  [Posting Help]  [Return to Forum]   [Log in to Reply]

Hop to:


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. [ About Us ]

Home  |  Forums


Copyright © 1997-2023 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