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Tractor Talk Discussion Forum

Engine Missing Plugs, wires???

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G in Minnesota

06-23-2007 21:00:33




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I have a tractor that has one or two cylinders missing. When I pull the spark plug wire out of the distributor, and it arcs about 1/2 inch, they start firing. Switching the wires with other ones that fire does not seem to matter. I changed the gap on one of the plugs to be smaller 0.016 and it started firing. The other one did not matter much with a smaller gap. Any ideas what the problem may be?

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G in Minnesota

06-26-2007 07:35:02




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 Re: Engine Missing Plugs, wires??? in reply to G in Minnesota, 06-23-2007 21:00:33  
I put in the new plug and copper wires and it runs great! Thanks for the suggestions!



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Marv

06-24-2007 07:57:38




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 Re: Engine Missing Plugs, wires??? in reply to G in Minnesota, 06-23-2007 21:00:33  
Check for a bad/leaking manifold gasket. Spray some WD40 on the gasket and if you notice a change in engine sound the gasket is leaking air.



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Janicholson

06-24-2007 05:47:48




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 Re: Engine Missing Plugs, wires??? in reply to G in Minnesota, 06-23-2007 21:00:33  
BuickandDeere has the answer. As you pull off the wire, the spark voltage goes up radically. This increase causes the spark plug to fire even when contaminated with a carbon track. New plugs will make it work (for a while). Adjusting the carb, or rebuild of engine may be needed if it smokes at all. JimN



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G in Minnesota

06-23-2007 21:59:17




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 Re: Engine Missing Plugs, wires??? in reply to G in Minnesota, 06-23-2007 21:00:33  
Any suggestions on solid core wire source? These do not appear to be.



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RustyFarmall

06-24-2007 05:01:40




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 Re: Engine Missing Plugs, wires??? in reply to G in Minnesota, 06-23-2007 21:59:17  
Those wires are available right here on YT, or try ebay, or send me an e-mail.



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Walt Davies

06-23-2007 22:32:55




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 Re: Engine Missing Plugs, wires??? in reply to G in Minnesota, 06-23-2007 21:59:17  
Napa has copper core kits in both 4 and 8 wire system. I alway buy the 8 because I can do 2 4's with it for one a few dollars more.
Walt



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Jeff McBride

06-23-2007 21:43:15




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 Re: Engine Missing Plugs, wires??? in reply to G in Minnesota, 06-23-2007 21:00:33  
Have a Super M that done the same thing. I replaced the plugs and it done fine. The bad part is the plugs that where in it were only a month old. They were autolites



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buickanddeere

06-23-2007 21:09:15




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 Re: Engine Missing Plugs, wires??? in reply to G in Minnesota, 06-23-2007 21:00:33  
Replace, do not clean modern spark plugs. Just guessing here as I have no idea of the engine make, model, condition etc.Odds are either new Autolite 216 or 437, 3116 or 378 will be a place to start. If the wires are not solid core, non resisitor units. Toss them as well. Is the engine burning oil,running rich or being operated too cold?



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