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Thread: What plug in gt40p heads
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07-08-2007, 02:56 PM   #1 (permalink)
56chevyguy
 
Join Date: Jun 2007
Posts: 5
What plug in gt40p heads
I am trying to get my mustang running. It has a 94 5.0 with fuel injection, & gt40p heads. It has a misfire intermintly at idel & on acceleration. I suspect I have the wrong plugs in it. could some of you 40p users tell me what plugs you are using. It is a stock short block & driven on the street only. 56chevyguy
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