351w plug wire seperation

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Jan 21, 2006 | 05:13 PM

toolmantk

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Joined: May 2003

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From: Southern West Virginia

351w plug wire seperation

I searched the forum for this with no luck. I'm sure it has been discussed but I can't seem to find it. I remember reading about an issue with the firing order of a 351w and the arrangement of the plug wires in a certain way to prevent pre-ignition of a perticular cylinder. It was a situation where the energy from one plug wire was being transfered to another by induction and causing that cylinder to fire prematurely. I think the fix was to make sure the two wires in question crossed over each other at least once. I checked my Haynes manual but there was no mention of the problem. Anyone heard of this before?

Thanks

Jan 21, 2006 | 08:09 PM

Bdox

Fleet Owner

Joined: Sep 2005

Posts: 28,609

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From: Lake Tahoe, Nevada

I'm certainly no 351 guru but if that is happening there is too much current flowing through those plug wires. What you are describing is exactly what makes an ignition coil work. Two wires running paralell to each other could certainly do that, but the fix would be to replace the wires. I have only seen this happen with metal conductors. The resistance wires, almost universally in use, limit the current flow so that they don't create radio interference, but have the side benefit of reducing cross induction.

This problem is soooo fifties!

Jan 21, 2006 | 08:37 PM