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Ford 9N, 2N & 8N Discussion Forum
:

Spark plug wires in the tube above the engine

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James41-9n

02-07-2005 14:36:01




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Hey is it important that the spark plug wires are run through the little tube that runs the length of the block from front to back? Thanks in advance.




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Dell (WA)

02-07-2005 15:04:41




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 Re: Spark plug wires in the tube above the engine in reply to James41-9n, 02-07-2005 14:36:01  
Jim..... ...back in the olden dayz when yer 9N engine was designed, the QUALITY of sparkie wire insulation was not that great. So in an "exposed" environment, the COPPER-CORE sparkie wires were run THRU the tube to protect them from the waterized environment. Modern copper-core insulation is so much better that the added environmental protection of the sparkie tube is really not necessary ...howsomevers... you do need to SUPPORT the wires and the sparkie tube is ideal for that job. Tip: use some real silacon spray to help slide your sparkies wires thru the tube starting with sparkie #4 first..... ....Dell, self-appointed sparkie-meister

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Rob N VA

02-07-2005 18:55:49




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 Hey Dell in reply to Dell (WA), 02-07-2005 15:04:41  
Please help me clear something in my head that my father told me once. My dad was an electrical engineer also, and told me that spark plug wires needed to be seperated so that the spark would not follow the spark in the other wires (or something like that) can you clear this up for me? Like as in how this is possible, or why this happens? He must have told me that 15 years ago, and unfortunatly he is no longer around to refresh my memory. Thanks so much!--Rob

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Dell (WA)

02-07-2005 20:31:05




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 Re: Hey Dell in reply to Rob N VA, 02-07-2005 18:55:49  
Yeah Rob..... ...there are some GM V-8's that have a "cross-fire" problem with some highpower ignitions and weird firing orders. They have special wire routing schemes to minimumize that effect, generally shown in some engine tune-up manuals. Better, thicker insulation and carbon-core sparkie wires have pretty much solved that problem for GM.

As I said, modern silicone insulation has solved that problem with our low-output N-Sparkies.

Yer dad was right..... ....but it's generally NOT A PROBLEM ennymores..... ....Dell

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Jack (NV)

02-07-2005 20:22:51




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 Re: Hey Dell in reply to Rob N VA, 02-07-2005 18:55:49  
It is possible with today's very high voltage electronic ignitions to induce a voltage in the spark plug cable next to it. Car manufacturers have in many cases removed the distributor and plug wires and installed a coil on top of each spark plug to resolve this. For a Ford tractor to induce a voltage into a neighboring cable and cause a misfire is highly unlikely.



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9n141

02-07-2005 14:58:29




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 Re: Spark plug wires in the tube above the engine in reply to James41-9n, 02-07-2005 14:36:01  
We do them all that way.



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