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Old 06-15-2012, 07:08 PM
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Join Date: Oct 2004
Location: Brunswick, GA
Cobra Make, Engine: BDR 1311 428PI
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Dan, if you're asking about the difference between the screw-in type plugs and the ones in your block, the ones in your block are just the stock type. If they are all there I wouldn't worry about it. You said 15# at idle, what idle rpm? When the RPMs jumped did the OP jump as well? If so, what did it jump to?
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