Welcome! Please use the navigational links on your left to explore our website.

Company Logo Shop Now
   Allis Chalmers Case Farmall IH Ford 8N,9N,2N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver
 
Marketplace
Classified Ads
Photo Ads
Tractor Parts

Community
Discussion Forums
Project Journals
Tractor Town
Your Stories
Show & Pull Guide
Events Calendar
Hauling Schedule

Galleries
Tractor Photos
Implement Photos
Vintage Photos
Help Identify
Parts & Pieces
Stuck & Troubled
Vintage Ads
Community Album
Photo Ad Archives

Research & Info
Articles
Tractor Registry
Tip of the Day
Safety Cartoons
Tractor Values
Serial Numbers
Tune-Up Guide
Paint Codes
List Prices
Production Nbrs
Tune-Up Specs
Torque Values
3-Point Specs
Glossary

Miscellaneous
Tractor Games
Just For Kids
Virtual Show
Museum Guide
Memorial Page
Feedback Form

Yesterday's Tractors Facebook Page

Related Sites
Tractor Shed
Ford 8N/9N Club
Today's Tractors
Garden Tractors
Classic Trucks
Kountry Life
  
Ford 9N, 2N & 8N Discussion Forum
Order Ford 8N Parts Online

Ford 8N ignition problem

Welcome Guest, Log in or Register
Author  [Modern View]
Shayneberlo

06-06-2020 15:01:57




Report to Moderator

i have a Ford 8N with a 12 volt conversion. It runs great at startup then sputters, misses and eventually dies after a few minutes. It will not start back up for several hours. Ive replaced spark plugs/wires, distributor, condenser and coil. Its getting fuel and carburetor is clean. What else might be causing this problem and how do I diagnose it?




[Log in to Reply]   [No Email]
Shayneberlo

07-20-2020 08:40:42




Report to Moderator
 Re: Ford 8N ignition problem in reply to Shayneberlo, 06-06-2020 15:01:57  
Problem ended up being a faulty (and brand new) Interstate battery was causing problems with the self exciting alternator.



[Log in to Reply]  [No Email]
Shayneberlo

06-09-2020 10:32:44




Report to Moderator
 Re: Ford 8N ignition problem in reply to Shayneberlo, 06-06-2020 15:01:57  
Quoting Removed, click Modern View to see

thanks - will take a look at that. What is the best way to diagnose at bad ignition switch? Disconnect the switch and jump via starter?



[Log in to Reply]  [No Email]
rvirgil_KS

06-07-2020 09:23:27




Report to Moderator
 Re: Ford 8N ignition problem in reply to Shayneberlo, 06-06-2020 15:01:57  
When it fails have you checked voltage at coil input? Could be a bad switch



[Log in to Reply]  [No Email]
JMOR

06-07-2020 07:33:44




Report to Moderator
 Re: Ford 8N ignition problem in reply to Shayneberlo, 06-06-2020 15:01:57  
[quote="Shayneberlo"](quoted from post at 10:12:10 06/07/20) Quoting Removed, click Modern View to see"a few minutes" is a bit of a puzzle, as too long to empty carb bowl and too short to build much heat?

I support Bruce in measuring, but in absence of measuring, we can experiment, I guess. So, next time it sputters to a stop, immediately pull the jumper wire from your pocket and short across the resistor and see if it will start.

[Log in to Reply]  [No Email]
Shayneberlo

06-07-2020 07:12:10




Report to Moderator
 Re: Ford 8N ignition problem in reply to Shayneberlo, 06-06-2020 15:01:57  
[quote="CVPost-Bruce(VA)"](quoted from post at 18:10:59 06/06/20) " but I would imagine"

Why guess?

Confirm that you have a spark problem.....or not.
For example, the coil description says " This coil is used with an External Resistor if needed. " How do you know it needs one The only way to find out is to
measure the internal resistance of the coil. If it's 3.25 ohms or more, you do not need a resistor. And, while you are measuring, check the resistor. Some may
actually be .6 ohms as advertised.

The tractor was running good for a few years and I didn't make any modifications, so my thinking was something has failed or is failing. I replaced likely ignition and fuel parts but did not modify any existing configurations. The issue seems to be related to heat, as it runs well for a few minutes and then starts failing. I'm guessing that a spark gap tester would show good results during initial startup and then inconsistencies once it starts missing/sputtering?

[Log in to Reply]  [No Email]
Shayneberlo

06-06-2020 17:33:30




Report to Moderator
 Re: Ford 8N ignition problem in reply to Shayneberlo, 06-06-2020 15:01:57  
thanks for your reply. Yes, I am using plan 1, replace everything. Primarily because the parts are very old anyway. I do not have spark gap tester, but I would imagine that it would show good spark when first started and then inconsistent spark after running it awhile.



[Log in to Reply]  [No Email]
Bruce(VA)

06-06-2020 18:10:59




Report to Moderator
 Re: Ford 8N ignition problem in reply to Shayneberlo, 06-06-2020 17:33:30  
" but I would imagine"

Why guess?

Confirm that you have a spark problem.....or not.

For example, the coil description says " This coil is used with an External Resistor if needed. " How do you know it needs one The only way to find out is to measure the internal resistance of the coil. If it's 3.25 ohms or more, you do not need a resistor. And, while you are measuring, check the resistor. Some may actually be .6 ohms as advertised.

[Log in to Reply]  [No Email]
Shayneberlo

06-06-2020 17:26:07




Report to Moderator
 Re: Ford 8N ignition problem in reply to Shayneberlo, 06-06-2020 15:01:57  
Quoting Removed, click Modern View to see

Thanks for your reply.
Front mount distributor right next to cylindrical coil
Coil has a resistor and its been replaced as well. Resistor tests at .6 ohms
Yes, the fuel is coming out of the drain plug at the rate you suggested.
here the details of the coil and resistor

PARTS FORD Coil, Ignition 12V - Ignition Coil. This coil is used with an External Resistor if needed. Replaces OEM part numbers Case-International Harvester - 353875R91, 395331R91, 106230C91, 385403R91, AT10399, 189673M92, 189673V2., PN: D8JL12029A, $9.92, Qty: 1

PARTS FORD Resistor - For 8N, 9N, 2N, and 4 cylinder engines on 600 - 4000 tractors 1955-1964. Used in our 12 volt conversion kits. This resistor tests at .6 ohms under load through a distributor., PN: 8NE10306, $3.29, Qty: 1

[Log in to Reply]  [No Email]
Bruce(VA)

06-06-2020 15:52:39




Report to Moderator
 Re: Ford 8N ignition problem in reply to Shayneberlo, 06-06-2020 15:01:57  
These tractors are pretty simple machines; itís usually pretty easy to get them running with some basic troubleshooting steps.

There are three approaches you can take:


1. Replace every part you can until it starts or you run out of money.

2. List every possible cause of the problem and then randomly pick your favorite to check. It could be your coil. Or your ignition switch. Or about 10 other things.


3. Like diagnosing any other equipment failure, take a step-by-step approach, working from the most likely to the least likely, one system at a time.

Iíve tried all three approaches. The third one always worked for me. Sounds like you are trying option # 1.

I might not be able to tell you why your tractor isnít running, but I can tell you how to figure it out for yourself.


You could have a spark issue.


You could have a fuel issue.


Donít guess. Troubleshoot. Do exactly as JMOR suggested. See tip # 13 at the link below.


You need to answer 2 questions before you do anything else:


With the bolt in the carb bowl removed and the gas on, will the fuel flow fill a pint jar in less than 2 minutes?


Next, get out your adjustable gap spark checker * , open the gap to 1/4", hook it up, turn the key on and crank the engine. Does the spark jump 1/4"? Post back with the answers.


And do not buy a new part for the tractor until you can answer this question: how do I know the part on the tractor is defective? Once you narrow the problem to spark or fuel, post back and tell us what you found (and how you found it) and you will get plenty of help to get your tractor running.

* Don't own an adjustable gap spark checker? Buy one! Not a test light! Until then, take an old plug, open the gap 1/4" ground it to the head & look for spark. Itís not the color of the spark that counts; itís the distance it jumps.

https://www.autozone.com/test-scan-and-specialty-tools/ignition-tester/oemtools-adjustable-ignition-spark-tester/10257_0_0?
cmpid=PLA:US:EN:AD:NL:1000000:TLS:71700000043798748&gclid=Cj0KCQiAovfvBRCRARIsADEmbRKBdAvAmtFfOvYiYXR7T6NYiW57uyv5-
dEKjVT_h2KogQNUUMsRixYaAlU3EALw_wcB&gclsrc=aw.ds

[Log in to Reply]  [No Email]
JMOR

06-06-2020 15:39:50




Report to Moderator
 Re: Ford 8N ignition problem in reply to Shayneberlo, 06-06-2020 15:01:57  
Most likely one of those 6 items that you pronounced all well & good isn't. Front mount distributor or side mount? Coil require a resistor or not? If yes, what resistor is being used (style & value in Ohms). Checked fuel flow out carb bowl drain plug for a pint in 2-3 minutes?



[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 © 1997-2020 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