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Spark Plugs and Gap help?..

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Old Feb 28, 2021 | 12:03 PM
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Default Spark Plugs and Gap help?..

Had a shop in town put in a set of plugs and gap them......and now it has a terrible miss in it.......Can someone with plug knowledge look at my signature for my 2015 and recommend a set of plugs and the gap for them..I usually keep the Methanol injection set on 30 and it does 12 lbs of boost with all the other goodies

thanks.......
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Old Feb 28, 2021 | 02:18 PM
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What plugs did they use? Did you check your wires to see if they are all snapped on to the plug correctly? DId you check your wires to see if they are hooked up to the coils correctly? I ran TR6 with 7 PSI, I'd run TR7 with > 12 PSI. My TR6s were gapped at .039 but I did not run methanol, so you need a meth head for that information. Probably .030 for your amount of boost.

Elmer




Last edited by eboggs_jkvl; Feb 28, 2021 at 03:38 PM.
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Old Feb 28, 2021 | 02:39 PM
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Originally Posted by eboggs_jkvl
What plugs did they use? Did you check your wires to see if they are all snapped on to the plug correctly? DId you check your wires to see if they are hooked up to the coils correctly? I ran TR6 with 7 PSI, I'd run TR7 with > 12 PSI. My TR6s were gapped at >039 but I did not run methanol, so you need a meth head for that information. Probably .030 for your amount of boost.

Elmer
Thanks...he ordered a set of new GM wires and put them on but it made no difference.....I’m no mechanic but guess one of the plugs is bad or the gap is wrong.....I’ll let him check a couple of things before we have to pull plugs. I’ll pass your info on to him. Thanks again.....
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Old Feb 28, 2021 | 03:03 PM
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I’m at 10psi with meth and headers and I run NGK 6510 plugs gapped at .030”

Last edited by BlueDevilZ51; Feb 28, 2021 at 03:04 PM.
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Old Feb 28, 2021 | 03:41 PM
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MIght be a bad plug, cracked porcelein. If he gapped at .030, that's probably not an issue. Any codes being thrown?


Elmer
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Old Feb 28, 2021 | 07:30 PM
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Originally Posted by eboggs_jkvl
MIght be a bad plug, cracked porcelein. If he gapped at .030, that's probably not an issue. Any codes being thrown?


Elmer
No codes....he will ride with me tomorrow with his laptop plugged in and see if we have a cylinder not firing properly...Thanks
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