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Old 06-08-2010, 05:50   #1 (permalink)
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Combustion Efficiency

I have a 1992 F-150 Super Cab with an inline 4.9 300 CID. (116,000 miles), 5-spd standard transmission.

I have recently cleaned the injectors and replaced the cap, rotor and plugs using premium parts.

I am wondering if it is worth my while to replace the plug wires and possibly the coil with a better solution.

I have heard of individuals using 8.5 mm plug wires and replacing the existing coil (I still have the factory one on the truck), with something superior.

Does anyone know the mm of the standard wires that come with the truck? They are still the original wires.

I just don't know if it is worth my while to beef-up these two components; and if so, what is the best solution for me.

Right now, the truck runs good. But could I do better?
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Old 06-08-2010, 22:28   #2 (permalink)
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Re: Combustion Efficiency

I don't know what the original plug wire size is but if the original coil and wires are performing well then you may not gain anything much with an upgrade.

As the vehicle is a 92 model then I would think the wires may be getting a little dodgy and perhaps have higher resistance so replacement would certainly be something to think about.
If you want to replace the coil with a higher power unit at any stage then you should use the larger wires.
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