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Dec 19, 2020 | 06:44 PM

#21

subfloor@centurytrans

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Quote:

Originally Posted by gavinfdavies

Regarding the NGK plugs there are loads of counter fit items about. I make sure to buy genuine ones from known good vendors, usually platinum or iridium, and use them on my bikes and cars. Touch wood all fine so far.

I'm curious to know what the issues were, so I can keep an eye out for them.

It's been several years but I do remember once seeing a TSB regarding NGK plugs wreaking havoc with the TCM electronics.

Dec 19, 2020 | 06:52 PM

#22

gavinfdavies

Burning Brakes

Joined: Nov 2019

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From: Newport, south Wales

I'd be interested to see that. Can you recall what engine or make/model it was for? I'm guessing electrical interference.

I had one bike where the iridium plug option was a non resistor type, which caused issues with the ignition system set up for resistor plugs. All became a moot point when the primary drive again exited out the front of the engine casing! Lol

Dec 19, 2020 | 06:56 PM

#23

subfloor@centurytrans

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2024 C6 of the Year Finalist - Modified

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Quote:

Originally Posted by gavinfdavies

Unfortunately I don't remember the specifics.

I know NGK makes good products, just not all of them play well with others.

Dec 19, 2020 | 08:27 PM

#24

jamieo

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Melting Slicks

Joined: Oct 2010

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From: Tollesboro Kentucky

I am going to try a set of factory plugs I have and see what happens.Cheap troubleshooting and maybe I will get lucky and resolve my issue.

Dec 19, 2020 | 09:49 PM

#25

grpweld

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From: Fallbrook SanDiego county

I've been running ONLY NGK plugs in my racecar for over 15 years, I'd wager that more than %75 of the other racers run them as well. I have been running NGK plugs in my LS2, LS3 headed car 3 years with no issues at all. My tuner who is very highly regarded recommends them.

Dec 20, 2020 | 02:16 PM

#26

old motorhead

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From: Southeast TX

Quote:

Originally Posted by grpweld

Some folks get by with them just fine. Some don't. I didn't. I changed to stock Delco LS9/LS7 plugs from that point forward and haven't had any problems since. I could see using the cheap TR6 plugs in a race car if you're changing them out often. My goal was to get the right ones in there the first time and not have to worry about them for a very long time. I had problems with them once. I don't see any reason to revisit that. They aren't "better" than GM plugs, just cheaper. And it didn't require a lifestyle change to afford the Delco plugs either....

Jan 22, 2021 | 02:22 PM

#27

jamieo

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Melting Slicks

Joined: Oct 2010

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From: Tollesboro Kentucky

Just an update.Swapped out the plugs for Delco 41-104 plugs and also changed the wires.They all had consistent ohm readings and I didn't see any issues with the plugs either.Anyway,the issue went away.Not sure which one fixed it but I can honestly say I don't care.I didn't feel like doing one thing and trying it to determine the issue.Already had the wires so it only cost me about $50 for the plugs.About the easiest plugs I have changed other than looking for the one I dropped into the lower control arm.