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Tractor Talk Discussion Board

stumped on spark issue

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Posted by normmack on September 11, 2014 at 19:02:23 from (108.55.68.78):

I have been trying to figure this out for longer than i care to admit. I am working on 4 cylinder gas engine with firing order of 1342. #2 and 3 cylinders will not fire correctly. I had always assumed it was my distributor but today I took the the #1 wire and held next to all plugs and 1 & 4 jumped a nice strong spark and 2 & 3 had very weak spark. did the same with the #2 wire with same result. and the did same with #3 wire with same result.
Ok, I then put a new plug in the #3 hole and tried again with the same result.
I feel that i ruled out a faulty distributor as three different wires/lobes/rotor positions give me the same result with weak spark on 2 and 3 cylinders.
I also feel that since i tried a new plug it cannot be fouled plugs.
I am not sure how its possible but its like the plug is not grounded while screwed into the head. I am out of ideas.
My next plan is to take off carb and burn out cylinder- put all new plugs in and try same again, in case it does have something do with fouled plugs.
any suggestions ???
thanks
norm

Replies:

Re: stumped on spark issue B-maniac 20:05:24 09/12/14 (2)
- Re: stumped on spark issue normmack 04:46:51 09/13/14 (1)
  - Re: stumped on spark issue B-maniac 14:40:14 09/13/14 (0)
Re: stumped on spark issue Tech 7 13:58:01 09/12/14 (1)
- Re: stumped on spark issue normmack 14:21:27 09/12/14 (0)
Re: stumped on spark issue Nebraska Cowman 10:31:13 09/12/14 (2)
- Re: stumped on spark issue normmack 13:16:00 09/12/14 (1)
  - Re: stumped on spark issue Nebraska Cowman 03:17:23 09/13/14 (0)
Re: stumped on spark issue hughb 09:58:26 09/12/14 (3)
- Re: stumped on spark issue normmack 13:18:06 09/12/14 (0)
- Re: stumped on spark issue jimg.allentown 10:03:59 09/12/14 (1)
  - Re: stumped on spark issue normmack 13:25:10 09/12/14 (0)
Re: stumped on spark issue glennster 09:55:47 09/12/14 (1)
- Re: stumped on spark issue normmack 13:20:30 09/12/14 (0)
Re: stumped on spark issue Aaron Ford 08:55:07 09/12/14 (0)
Re: stumped on spark issue Hobo,NC 08:33:02 09/12/14 (0)
Re: stumped on spark issue jimg.allentown 08:29:26 09/12/14 (1)
- Re: stumped on spark issue normmack 08:47:42 09/12/14 (0)
Re: stumped on spark issue Kyle in Ky 07:58:19 09/12/14 (1)
- Re: stumped on spark issue normmack 08:00:19 09/12/14 (0)
Re: stumped on spark issue El Toro 07:50:47 09/12/14 (1)
- Re: stumped on spark issue normmack 07:59:05 09/12/14 (0)
Re: stumped on spark issue Allan In NE 07:03:08 09/12/14 (3)
- Re: stumped on spark issue normmack 07:18:24 09/12/14 (2)
  - Re: stumped on spark issue Allan In NE 07:41:53 09/12/14 (1)
    - Re: stumped on spark issue normmack 07:47:33 09/12/14 (0)
Re: stumped on spark issue Traditional Farmer 04:19:24 09/12/14 (1)
- Re: stumped on spark issue normmack 05:19:44 09/12/14 (0)
Re: stumped on spark issue normmack 02:50:03 09/12/14 (0)
Re: stumped on spark issue 4play 00:03:39 09/12/14 (0)
Re: stumped on spark issue Steve@Advance 21:22:36 09/11/14 (0)
Re: stumped on spark issue Waltdavies 20:38:22 09/11/14 (0)
Re: stumped on spark issue Janicholson 19:58:20 09/11/14 (0)
Re: stumped on spark issue NCWayne 19:48:30 09/11/14 (1)
- Re: stumped on spark issue normmack 02:16:15 09/12/14 (0)
Re: stumped on spark issue jimg.allentown 19:48:12 09/11/14 (0)
Re: stumped on spark issue Bob 19:40:28 09/11/14 (2)
- Re: stumped on spark issue normmack 02:29:20 09/12/14 (0)
- Re: stumped on spark issue normmack 02:27:16 09/12/14 (0)
Re: stumped on spark issue redforlife 19:29:10 09/11/14 (3)
- Re: stumped on spark issue normmack 19:32:44 09/11/14 (2)
  - Re: stumped on spark issue redforlife 19:45:44 09/11/14 (1)
    - Re: stumped on spark issue normmack 02:30:27 09/12/14 (0)
Re: stumped on spark issue ShadetreeRet 19:21:54 09/11/14 (4)
- Re: stumped on spark issue normmack 19:29:21 09/11/14 (3)
  - Re: stumped on spark issue ShadetreeRet 19:46:24 09/11/14 (1)
    - Re: stumped on spark issue normmack 02:39:38 09/12/14 (0)
  - Re: stumped on spark issue redforlife 19:36:23 09/11/14 (0)
Re: stumped on spark issue gene bender 19:18:53 09/11/14 (0)
Re: stumped on spark issue used red mn 19:18:34 09/11/14 (3)
- Re: stumped on spark issue normmack 19:24:29 09/11/14 (2)
  - Re: stumped on spark issue Dave Berg 06:19:40 09/12/14 (1)
    - Re: stumped on spark issue normmack 06:41:32 09/12/14 (0)

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