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Spark plugs revisited

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Old 12-08-2012, 02:31 PM
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Originally Posted by mslipac
misfire is still there with new plugs gap at .034 I will try gaping down to .025 when it warms up -25'c this morning
Lets us know the results! You shouldn't have any issues with spark blow-out with that gap.
Old 01-02-2013, 09:19 PM
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decided to pull NGK plugs after 15000kms due to truck going in to get the TSB done for intercooler etc today this is what the looked like


I installed my stock plugs regapped them to .030 see what happens
Old 01-02-2013, 10:17 PM
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Guess I really should break down and replace my ngks with the autolites I have sitting in the backseat. Those look pretty white.
Old 12-10-2013, 08:28 PM
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What was the best gap and plug combination that came out of this testing??
Old 12-10-2013, 08:51 PM
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I've read enough of these threads to suggest stock heat range gapped at .030 yields the best results.
Old 12-10-2013, 09:08 PM
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I'm one range colder at .028 with zero issues. Race gas tunes or 93...haven't had a problem.
Old 12-10-2013, 10:15 PM
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Originally Posted by VoiceOfReason
Your OEMs gap is too wide. The NGK LTR6IX plugs are better plugs and the correct heat range, your plugs look healthy, stay with those. Ideally, set the gap between .030 and .032" and run mid-grade or better ethanol-blended fuels, Ultra94 if you can find it. Many people will tell you this will kill your mileage but this is misguided advice.
Wow, kinda forgot about this thread.

I've been running the NGK LTR6IX plugs gapped at .030" for almost a year now. No misfiring or issues of any kind with the plugs. My truck also ran great with the LTR7IX plugs (one step colder). If I ever switched to a hot tune, then I'd throw the 7s back in.



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