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Car is cutting out/missing after new plugs.

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Old 03-27-2009, 08:18 PM
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Default Car is cutting out/missing after new plugs.

I can't remember the code on the plug but there 2 degree colder V powers. Gaped to 28. We switched out the plugs and changed the oil and now the car is missing and random spots while excel and shuttering while cruising. And ideas? We have always run these plugs at this gap. Any thoughts? Boosted LS/VTEC @ bar.

What does the 11 under the part number mean again? I had my old tuner tell me it means they come pre gaped. Now I know that wouldn't be tapped for boost. But is that right?
Old 03-28-2009, 02:07 AM
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Default Re: Car is cutting out/missing after new plugs.

Anyone? Think we should tighten up the gap to 26? I don't think a couple thousands would make that much of a differance. The car was put away all winter so we took it to get oil and a filter and new plugs. The car ran fine. We took it home and changed the plugs and oil and it was doing this after.
Old 03-28-2009, 06:21 AM
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Default Re: Car is cutting out/missing after new plugs.

Try 22, I wouldn't go above 24 on a turbocharged car. Also try Denso IK24s, not cheap, but the best
Old 03-28-2009, 02:47 PM
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Default Re: Car is cutting out/missing after new plugs.

no need for iridiums. how much power are you making? guessing you are on 7's?
try gapping them down till the miss goes away.
Old 03-28-2009, 02:52 PM
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Default Re: Car is cutting out/missing after new plugs.

He's making 344 on a mustang dyno on 19psi. He's running 11.92 @ 119 with full interion in a DC4. He's only running 1 bar right now.
Old 03-28-2009, 02:56 PM
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Default Re: Car is cutting out/missing after new plugs.

youll be fine with 7's.
Old 03-28-2009, 03:02 PM
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Default Re: Car is cutting out/missing after new plugs.

That's what they are. What does an 11 under the part number mean?
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