No fire going to plugs

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Steve Butram
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Re: No fire going to plugs

Postby Steve Butram » Thu Dec 31, 2015 7:10 am

what type of plug wires are you using. I recommend solid core wires

Pull the D cap off and manually manipulate the points to see if you get consistent spark . Your condenser may be getting weak

Another thought, The stud that runs through the distributor body may be shorting to ground. Check the stud to see that it has the proper dielectric washers
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Re: No fire going to plugs

Postby SouthernOutlaw » Thu Dec 31, 2015 7:54 am

Read this thread this morning, and it reminded me of what happened to me last spring. I purchased a new distributor cap, rotor, and plug wires at tractor supply for my 600Ford. The tractor has seen converted to electronic ignition. Installed everything when I got home, the tractor cranked perfect, and I plowed for a hour. Finished plowing, and drove the tractor back home and parked it. Three days later tried to crank her and no fire. After checking everything I tried the old distributor cap. She cranked up and ran perfect. Found the problem was in the center contact on the cap. New cap, bad center contact. Made a two hour drive to my NAPA store for a new cap and rotor. No problems since then.

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Re: No fire going to plugs

Postby Jim Becker » Thu Dec 31, 2015 10:53 am

CraigKennedy wrote:. . . Also i checked different plug wires by plugging them in the coil, and connected to spark tester, and grounded to head bolt, all had good fire, so plug wires are not the problem. . . .

I haven't seen it clearly stated either way. Have you done this test on the secondary coil-to-distributor wire? Are all the contacts where the wires plug into the cap clean?

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Re: No fire going to plugs

Postby Rodney51Cub » Fri Jan 01, 2016 7:56 am

When you had the initial problem were you using the spark tester or just grounding a plug to the block ?

If you were using a spark plug it could be bad plugs.

If you were using a spark tester, you need to check the coil to cap wire also as Jim asked about.

Jim Becker wrote:
CraigKennedy wrote:. . . Also I checked different plug wires by plugging them in the coil, and connected to spark tester, and grounded to head bolt, all had good fire, so plug wires are not the problem. . . .

I haven't seen it clearly stated either way. Have you done this test on the secondary coil-to-distributor wire? Are all the contacts where the wires plug into the cap clean?


The reason I say spark plugs is I have had two different tractors do as you have described. Both had good spark with tester and good looking plugs but not new. Put in a new set of plugs and it solved the problem.

Rodney 8)

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Re: No fire going to plugs

Postby CraigKennedy » Sat Jan 02, 2016 4:13 pm

Guys sorry for not checking back in sooner, i finally got some time today to look at it, sparkplug wires are fine, coil is firing, ive checked the coil and plug wires bu plugging then into the coil, instslling spark tester and contecting other end it plug, when i reinstall every thing back on D cap no fire. Now with that said i came out here to it about 1 oclock today and i got the tractor to crank., it did how ever run like crap, i switched it off now it will not crank up for anything. And still have no fire going to plugs

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Re: No fire going to plugs

Postby CraigKennedy » Sat Jan 02, 2016 4:25 pm

Also, i did remove the D cap, to look at points, while spinning engine i saw a slight spark between the points, so i am assuming points and condenser are fine?

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Re: No fire going to plugs

Postby Eugene » Sat Jan 02, 2016 4:58 pm

CraigKennedy wrote:I got the tractor to crank., it did how ever run like crap, i switched it off now it will not crank up for anything. And still have no fire going to plugs
Yellow spark at the points, bad condenser.

Edit: Engine will run with a bad condenser, but like crap.

Check battery voltage. Ignition system requires 4.5 volts or more through the coil to function. Battery condition may be a part of your problem. Have the battery tested.
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Re: No fire going to plugs

Postby sford » Sat Jan 02, 2016 7:51 pm

Spark between points means a bad condensor.


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