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You think the Platinum plugs are the problem?
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platinum is an inferior conductor compared to copper plugs.
the copper tip plugs have a better thermal conductor and would perform better under hard acceleration.
The only advantage is you will be getting longer life out of the platinum plugs.
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I have 9mm Ford racing wires
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These wires have a history of spark jumping between the wires.Take and open up your hood at night and look to see if you can see spark jumping around the sparkplug wires.It will look like a light show.If you see this,it's a bad thing.
Also they are the highest resistance wires on the market.the lower the resistance,the better the spark travel.