2.0L LSJ Performance Tech 205hp Supercharged SS tuner version. 200 lb-ft of torque.

Changed my plugs. How do the old ones look?

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Old 03-22-2007, 09:32 AM
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Changed my plugs. How do the old ones look?

I just changed all my plugs in my SC to the Zex 82003-4's. It was very easy to do for all of those who are interested in having it done. I took plenty of pics and will write a how-to if you guys feel the need for it.

I must say, after switching out the stock plugs for the zex, i can actually notice that the car pulls much smoother now than it ever has and idle has smoothed out as well. I give these plugs a for now. we'll see how they handle my car over time.

I have some pics of the old plugs. They are a very dark color...sooty if anything and had a very strong gas smell. I'm guessing this is because i am modded and these plugs are the wrong heat range. Any input would be appreciated.



Last edited by 06blackSC; 03-22-2007 at 09:36 AM. Reason: Automerged Doublepost
Old 03-22-2007, 09:54 AM
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These cars run rich anyway because of the supercharger. Yours look a little richer than I expected, but not so surprising since you have mods.
Old 03-22-2007, 10:02 AM
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Thumbs up

Originally Posted by 06blackSC
I just changed all my plugs in my SC to the Zex 82003-4's. It was very easy to do for all of those who are interested in having it done. I took plenty of pics and will write a how-to if you guys feel the need for it.

I must say, after switching out the stock plugs for the zex, i can actually notice that the car pulls much smoother now than it ever has and idle has smoothed out as well. I give these plugs a for now. we'll see how they handle my car over time.

I have some pics of the old plugs. They are a very dark color...sooty if anything and had a very strong gas smell. I'm guessing this is because i am modded and these plugs are the wrong heat range. Any input would be appreciated.


I would very much like a how to....I want to change the plugs in a few weeks and would like to do it myself!!
Old 03-22-2007, 10:05 AM
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Just compare them to this chart!

Yours looks like Carbon Deposits.

Old 03-22-2007, 10:08 AM
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sure, i can write a detailed how to. I think someone already made a how to for the LSJ tho. If there is enough interest, i can make another one. I have lots of pics.
Old 03-22-2007, 10:33 AM
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That plug chart is SOOO dated. Still acurate picture wise. But look at the troubleshooting tips for the rich plug! "High float, sticky choke, worn points". Our cars have none of those things anymore.
Old 03-22-2007, 10:35 AM
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Our cars dont have points? j/k
Old 03-22-2007, 10:36 AM
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Where did u get those ZEX plugs from ?
Old 03-22-2007, 10:41 AM
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Ebay, from seller speed_unlimited. I think they were like $25 shipped?

Originally Posted by Halfcent
That plug chart is SOOO dated. Still acurate picture wise. But look at the troubleshooting tips for the rich plug! "High float, sticky choke, worn points". Our cars have none of those things anymore.
You mean we DON'T have points?!?!....uh oh....i change something in my car i probably shouldn't have then.....







Last edited by 06blackSC; 03-22-2007 at 10:41 AM. Reason: Automerged Doublepost
Old 03-22-2007, 10:50 AM
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Originally Posted by NightriderCobaltSS
Where did u get those ZEX plugs from ?
Originally Posted by 06blackSC
Ebay, from seller speed_unlimited. I think they were like $25 shipped?



You mean we DON'T have points?!?!....uh oh....i change something in my car i probably shouldn't have then.....






I highly recommend them..very quick shipping.
I have a set I haven't used yet.
Old 03-22-2007, 11:36 AM
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Originally Posted by CTCOBALTSSS
Yours looks like Carbon Deposits.
Maybe high speed glazing?
Old 03-22-2007, 11:51 AM
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To do a proper plug check ,you have to be driving the car
Rev it to 3 or 4 grand and kill the ignition with out locking the steering and put in the clutch all at the same time and then coast to a stop.
Then on the side of the road pull out your plugs and check them !
Yours dont look to bad other than the carbon build up from idling.

They have a nice tan colour under that carbon from what I can see.

Iwould be extremely worried if they were shiny white. (hot, lean condition )
Old 03-22-2007, 11:52 AM
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Yeah that chart is dated. It was the only one I could find that was large enough to read.

I recommend the ZEX plugs too and the same ebay seller. They are good.

So I think the car is running a little rich that's all. Install some new ZEX plugs and you're golden like a shower.
Old 03-22-2007, 11:56 AM
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Originally Posted by CTCOBALTSSS
Yeah that chart is dated. It was the only one I could find that was large enough to read.

I recommend the ZEX plugs too and the same ebay seller. They are good.

So I think the car is running a little rich that's all. Install some new ZEX plugs and you're golden like a shower.


EWWWW golden shower


Does any one know where I can get these in Canada?
Old 03-22-2007, 12:34 PM
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Originally Posted by budman128
EWWWW golden shower


Does any one know where I can get these in Canada?
Bump to help out our Canadian friend.

That ebay seller might ship to Canada. I would send him a message and ask.
Old 03-22-2007, 01:22 PM
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You can order these strait from Zex themselves. I've ordered more than one set from them for various applications. They are owned by Comp Cams, just google Zex and they have a 800 number. Very simple process, and nice customer service.
Old 03-22-2007, 09:02 PM
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One of the Vendors on this site sells them Cobaltperformace Patrts Never Used them before but i hope they are good to do bussiness with
Old 03-22-2007, 09:35 PM
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are these ZEX plugs good enough for a stage 2 car... i dont plan on going any more...


i heard mixed reviews...
Old 03-22-2007, 10:01 PM
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They look just like mine did. Better rich than sorry....
Old 03-22-2007, 10:47 PM
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Originally Posted by syP
are these ZEX plugs good enough for a stage 2 car... i dont plan on going any more...


i heard mixed reviews...
Yes, the Zex plugs are fine for stage 2. So are the NGK BKR7E Copper plugs.

Originally Posted by Maxim_X
They look just like mine did. Better rich than sorry....
You are right my friend, you are right.
Old 03-23-2007, 12:25 AM
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How are these plugs past stage 2? I am not planning on anything right this second, but I do think I will go to the stage 3 pulley and a few other small things
Old 03-23-2007, 12:45 AM
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noob question

i'm runnig header back exhaust and injen cai, which plugs and what gap should i be using? i haven't done any other power mods.
Old 03-23-2007, 01:02 AM
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06blackSC, What is your list of mods? I was thinking about getting some new plugs but I only have 12,000 miles on the car and a cold air intake. I was thinking of getting a smaller pulley maybe 3.1. Do these plugs come a step colder? If so do you guys think it would be ok to run a 3.0" on stock injectors.
Old 03-23-2007, 06:19 AM
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my mods are stage II with 2.9" pulley and a fujita intake.
Old 03-23-2007, 06:51 AM
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those plugs look just like mine when i removed mine for the NGK ones Cobalt Addiction sells


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