NGK copper plugs throwing code?
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Joined: May 2015
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NGK copper plugs throwing code?
I recently just got a cam swap done and they replaced the spark plugs with the NGK, now to what I have noticed at a idle like at a stop light or rolling real slow the service charging system light comes on...iv had the issue non stop with this car and was wondering if that's what throwing it, my voltage is at 13.5-13.7 when the light comes on, once i start to move the warming goes away, could it be the plugs or a mix of plugs and a UD pulley...?
Drifting
Joined: Apr 2011
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From: Houston, Tx
St. Jude Donor '11-'12-'13-'14
U.D. Pulley would be my guess but not the plugs.With a wild cam you need a higher idle and it should make up for the Underdrive pulley. You should not get a code for anything above 13V.
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When i had it before I had to change a few alternators out and it finally went away, I called the speed shop that did the cam install and they said they never had those plugs cause an issue and to check my alternator again, but it never falls below 13v at idle when i get the warning
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Yes they can, check out post #7:
https://www.corvetteforum.com/forums...m-problem.html
There's also all kinds of other people having experienced similar issues with NGK plugs.
https://www.corvetteforum.com/forums...m-problem.html
There's also all kinds of other people having experienced similar issues with NGK plugs.
Supporting Vendor
Joined: Feb 2011
Posts: 3,527
Likes: 885
2024 C6 of the Year Finalist - Modified
2020 Corvette of the Year Finalist (track prepared)
2019 C6 of Year Winner (track prepared)
Turns out it was the plugs and as you probably guessed, that's the last time NGK plugs ever found themselves in any of my engines.
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Le Mans Master
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From: Southeast TX
Use A/C Delco 41-104's. That's the stock plug that is factory on Z06's and ZR1's. One heat range cooler than the stock LS3 plug. Others will fit (see NGK TR6), but none are any better.....and the vast majority aren't as good.