need help wd mag problems?
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Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=20293
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Topic: need help wd mag problems?
Posted By: briangroc
Subject: need help wd mag problems?
Date Posted: 03 Nov 2010 at 10:44am
ok
new plugs .025 gap
new wires solid core
tractor fires rite up, but has no power under load
when you pull the wire off the plug when running the 2 center spark plugs: there is no change in the tractor idle( not firing)
the 2 outside plugs you can here a change in the engine idle when removed
when i pulled the 2 center plugs there was fuel on them
Mag is not working properly? can i have it re built or what do you recommend
guys thanks for the help Brian
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Replies:
Posted By: Alberta Phil
Date Posted: 03 Nov 2010 at 11:17am
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Sounds like your new plug wires are not in the right order. Firing order for your tractor is; 1 2 4 3, not the more common 1 3 4 2.
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Posted By: Brian Jasper co. Ia
Date Posted: 03 Nov 2010 at 12:02pm
Verify firing order is correct like Phil says. If the wires are on right, move spark plugs and see if the misfire follows them. Champion plugs, in my experience, have no quality control. I have found them to have many more instances of defects than all others combined. If it's not the plugs, move the wires. When you removed the wires from the cyls that are not contributing, did they have a strong blue spark when held near the engine?
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"Any man who thinks he can be happy and prosperous by letting the government take care of him better take a closer look at the American Indian." Henry Ford
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Posted By: ALinIL
Date Posted: 03 Nov 2010 at 1:28pm
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Brian - Have you tried reversing plug wire 2 & 3. You do know that the mag runs CW as viewed from the cap end. - AL
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Posted By: briangroc
Date Posted: 04 Nov 2010 at 1:04am
i will try reversing the plugs this morning.
i think mag because tractor was running great for 3 years.
one day it was just running really rough, so i changed the plugs and wires
and same thing still happening.
Thanks guys
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