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Anyone have this problem with colder plugs? car was running great switched to ngk tr6 plugs gapped at .035 noticed at idle it had a slight miss but when i revved it or drove it, it was completely fine. Thought maybe it was the plugs switched to autolite 103s and same thing. is it because of the colder plugs or should i leave a bigger gap. Im only running a 75 shot so how much can i get away with. .040?
 

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ngk tr6 @ .035 working great
 
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