No fire going to plugs

Farmall Cub Forum -- Questions and answers to all of your Cub related issues.

Moderator: Team Cub

Forum rules
Notice: For sale and wanted posts are not allowed in this forum. Please use our free classifieds or one of our site sponsors for your tractor and parts needs.
CraigKennedy
Cub Star
Cub Star
Posts: 140
Joined: Fri Jan 31, 2014 7:52 pm
Zip Code: 28430

No fire going to plugs

Postby CraigKennedy » Sun Dec 27, 2015 11:44 pm

Hey yall, been busy as usual, got a new rebuild carburetor on my loboy today, when to crank and battery had died, hooked to charger and got to spin over good but still wouldn't run. Checked fire coming from coil, good spark, checked fire going to plugs, no fire, ever 10 cranks almost some fire. Lossing fire somewhere between the distributor cap and plug wires? Anybody had any experience with this?
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.
This is also a battery ignition system.
Thanks Craig

Eugene
Team Cub Mentor
Team Cub Mentor
Posts: 16875
Joined: Fri Jul 02, 2004 9:52 pm
Zip Code: 65051
Circle of Safety: Y
Location: Mo. Linn

Re: No fire going to plugs

Postby Eugene » Mon Dec 28, 2015 11:06 am

Remove the distributor cap. Check condition of the rotor and distributor cap.
I have an excuse. CRS.

CraigKennedy
Cub Star
Cub Star
Posts: 140
Joined: Fri Jan 31, 2014 7:52 pm
Zip Code: 28430

Re: No fire going to plugs

Postby CraigKennedy » Mon Dec 28, 2015 6:06 pm

Did that yesterday, also switched with another cap i had, still nothing. Tractor was running fine 2 weeks ago

Eugene
Team Cub Mentor
Team Cub Mentor
Posts: 16875
Joined: Fri Jul 02, 2004 9:52 pm
Zip Code: 65051
Circle of Safety: Y
Location: Mo. Linn

Re: No fire going to plugs

Postby Eugene » Mon Dec 28, 2015 6:14 pm

You have fire from the coil. This means that the coil and points are working.

Fire from each plug wire when switched to the coil. Plug wires are fine.

The only thing left is the distributor cap and rotor.

One other thing to check is to see if the distributor has slipped/rotated.

Any way, the problem is at or within the distributor.

Edit: No fire going to the spark plugs.
I have an excuse. CRS.

CraigKennedy
Cub Star
Cub Star
Posts: 140
Joined: Fri Jan 31, 2014 7:52 pm
Zip Code: 28430

Re: No fire going to plugs

Postby CraigKennedy » Mon Dec 28, 2015 6:51 pm

What could be wrong with the rotor or cap to make it stop working like that? I did take the rotor button off and scrated to down to the bare metal to see if it was a poor connection there, nothing happened.
Dont see anything wrong with the cap either?

muleboss
10+ Years
10+ Years
Posts: 937
Joined: Sat Dec 10, 2005 4:31 pm
Zip Code: 66839
Circle of Safety: Y
Location: KS. Burlington

Re: No fire going to plugs

Postby muleboss » Mon Dec 28, 2015 7:00 pm

Check the rotor. I have seen the little square notch on rotor wear off and lets rotor slip some.

sford
5+ Years
5+ Years
Posts: 33
Joined: Fri Apr 15, 2011 5:50 pm
Zip Code: 32321
eBay ID: thegreatford
Tractors Owned: cub loboy
cub
loboy 154
Location: Bristol, Florida

Re: No fire going to plugs

Postby sford » Mon Dec 28, 2015 7:28 pm

I had the exact problem this past week on my loboy. Put a new dist. cap on it today and it ran like a top. I think the button on the cap was the problem.

User avatar
John *.?-!.* cub owner
Team Cub Guide
Team Cub Guide
Posts: 22654
Joined: Sun Feb 02, 2003 2:09 pm
Zip Code: 63664
Tractors Owned: 47, 48, 49 cub plus Wagner loader & other attachments. 41 Farmall H.
Location: Mo, Potosi

Re: No fire going to plugs

Postby John *.?-!.* cub owner » Mon Dec 28, 2015 9:02 pm

You stated battery ignition system, is it a distributor or converted magneto? Have you tried a new rotor?
If you are not part of the solution,
you are part of the problem!!!

Scrivet
5+ Years
5+ Years
Posts: 2622
Joined: Sun Apr 19, 2009 9:51 pm
Zip Code: 63664
Location: MO, Potosi

Re: No fire going to plugs

Postby Scrivet » Mon Dec 28, 2015 10:56 pm

Are you getting the notch on the cap lined up correctly and the cap seated properly?

redman36
Posts: 20
Joined: Tue Nov 24, 2015 12:10 pm
Zip Code: 23234
Tractors Owned: 49 IH cub
50 I h cub
Location: n. Chesterfield va.

Re: No fire going to plugs

Postby redman36 » Tue Dec 29, 2015 6:43 pm

Lots of suggestions I failed to see anyone mention a rotor button shorted to distributor shaft. Take rotor off and look in shaft hole ,if carboned up replace it . It shorts coil to ground ,no plug fire even though you have fire at coil .

bythepond88
10+ Years
10+ Years
Posts: 1421
Joined: Sun Apr 30, 2006 2:54 pm
Zip Code: 60073
Circle of Safety: Y
Location: IL, Round Lake Heights

Re: No fire going to plugs

Postby bythepond88 » Wed Dec 30, 2015 1:28 pm

Thank you, Redman. That would never have occurred to me, but I can see how it could happen.
Michael Cummings
Eddie - a 1959 International Lo-Boy named after my father in law, who who bought her new.

Matt Kirsch
10+ Years
10+ Years
Posts: 4577
Joined: Tue Jun 08, 2004 3:04 pm
Zip Code: 14559
Circle of Safety: Y
Location: Rochester, NY

Re: No fire going to plugs

Postby Matt Kirsch » Wed Dec 30, 2015 1:54 pm

Even if timing were off, you should still get spark at the plugs. It would just be at the wrong time.

Eugene
Team Cub Mentor
Team Cub Mentor
Posts: 16875
Joined: Fri Jul 02, 2004 9:52 pm
Zip Code: 65051
Circle of Safety: Y
Location: Mo. Linn

Re: No fire going to plugs

Postby Eugene » Wed Dec 30, 2015 2:36 pm

bythepond88 wrote:Thank you, Redman. That would never have occurred to me, but I can see how it could happen.
I can't. The body of the rotor is plastic and a fantastic insulator. The metal strip that conducts the spark from the distributor cap center tap to the pointy end of the rotor is attached to the outer end of the rotor with a rivet.

In order for the spark to short out through the center of the rotor, the metal strip would have to be missing and a hole burnt through the rotor.
I have an excuse. CRS.

User avatar
KETCHAM
10+ Years
10+ Years
Posts: 5692
Joined: Thu Jul 28, 2005 2:37 pm
Zip Code: 44645
eBay ID: kevinb2366
Tractors Owned: 47 Cub 48 Cub 50 H
Location: Marshallville Ohio

Re: No fire going to plugs

Postby KETCHAM » Wed Dec 30, 2015 3:16 pm

I've had the metal tab on the rotor fall off before...maybe worn down to much....Got to be something simple...Kevin
47 CUB[Krusty] 49 CUB[Ollie] 50 H-- PLOWS DISCS MOWERS AND lots more stuff!!Life is to short -Have fun now cause ya ain't gonna be here long!!!!

aelzner71
Posts: 39
Joined: Wed Sep 03, 2014 11:37 am
Zip Code: 01201

Re: No fire going to plugs

Postby aelzner71 » Wed Dec 30, 2015 8:46 pm

In reading this I may have missed something but in my case this sounds like bad points. For me that is what it was after similar symptoms including good spark at the coil and occasional but weak spark at the plugs


  • Similar Topics
    Replies
    Views
    Last post
  • Dry plugs
    by Dave Irish » Sun Sep 20, 2015 10:25 am » in Farmall Cub
    9
    351
    by Dave Irish
    Sun Sep 20, 2015 7:24 pm
  • Carboned Up Plugs Attachment(s)
    by ajhbike » Mon Sep 11, 2017 7:28 am » in Farmall Cub
    8
    356
    by Rjpoog1989
    Fri Sep 15, 2017 5:35 pm
  • No Fire.
    by Danno » Sun Jun 18, 2017 4:14 pm » in Farmall Cub
    14
    507
    by Danno
    Thu Aug 10, 2017 6:45 am
  • I Have no fire Attachment(s)
    by Command52 » Sun Dec 24, 2017 1:57 pm » in Farmall Cub
    16
    506
    by John *.?-!.* cub owner
    Wed Dec 27, 2017 2:20 pm
  • 51 cub - no fire Attachment(s)
    by macec3(TX) » Mon Mar 13, 2017 6:22 pm » in Farmall Cub
    7
    260
    by staninlowerAL
    Tue Mar 14, 2017 3:27 pm

Return to “Farmall Cub”

Who is online

Users browsing this forum: len-pit and 9 guests