I recently took out my spark plugs because the car was running like **** and sputtered when I put my foot on the and misfiring really bad. I took out the spark plugs and to no surprise they were in horrible condition.

I bought some NGK spark plugs from advance and it was running beautifully for about a month. Now it's doing it again... and I don't know if it's because the spark plugs I bought suck or because something is causing the spark plugs to go bad so quick.

 

Sounds like there is something wrong, like running rich, lean, oil in the chamber, etc. causing it to foul the plugs so quickly.
Refer to this:
http://www.pdm-racing.com/features/plugs.html

 

Yea I've seen this chart before.. I guess the only thing left to do is pull the plugs and see the condition it's in. Anything I should be looking for other than the condition it's in once I take it out?

 

i don't know about most on the site, I changed my plugs every oil change...

doesn't mean that something isn't right but I also used meth inj as well.

is it just one plug? all plugs?

what color are they, black / white

what fuel are you using? stupid question I know, gap right?

 

Plugs every oil change what a waste of money.

 

most 8 owners use the cheaper copper plugs that are a few dollars if that piece and versus 9 owners not having anything but iridium to choose from

benefit of iridium is obviously they last significantly longer

 

Well,

im glad you think so

once again reading is key, aparently you do not use meth injection?!

if you look at my build, I was not using cheap o plugs but I just found out that meth likes to eat plugs so it was just a habit I got myself into. I didn't recommend to him he needs to do it, it was something I got into a habit of. I know I could have went another oil change on them but what the heck right

I also had an aggressive tune and running 30lbs of boost daily maxing out my setup

I was okay with spending the money on spark plugs to not have any issues

 

Have the car tuned for Iriduims, in a colder range. I ran coppers for a year, and went back to Iridiums. The driveability is much better, and they do last longer if you are daily driving the car.

 

Copper plugs are fine. Its all we use. If your fuel trims are off you can foul plugs frequently though.

 

Ugh.. sorry I know I'm kinda late just been really busy with school and work. Uhm they're white irridiums and they come pre-gapped. I just got the ones advance carried because the ones that were in before were so bad not sure of the specs but I think the heat range was the same too.

I made another observation today though. It doesn't happen in 1st or 4th gear. I haven't had enough space to try it in 5th but apparently its just 3rd and 2nd. Could that mean anything?

 

Do you know what the model number of the plugs you used is along with the manufacturer? Also do you have an viii or an ix? Lastly I know some people say not to gap the iridiums but I would. Use a feeler gauge and just be careful not to damage the tip.

 

DONT gap iridium. You can check gap very carefully with a gauge though.

Is your car tuned? Maybe you have a horrible tune?

I'm not sure if a bad cam angle sensor could affect some of this?

 

You can gap iridium plugs. Just have to be careful. If the gap is too large, lightly tap the plug on a metal surface, I use a socket. If the gap it too small, carefully open it up with a pair of pliers.

 

They're NGK spark plugs and have an Evo VIII. I called Advanced and they told me they were '3106' NGK plugs. Anything on these?

 

What i use and always keep on hand because they are $6 for a set locally.
http://www.sparkplugs.com/results_cross.asp?pid=bpr8es

What they told you to buy.
http://www.sparkplugs.com/results_cross.asp?pid=3106


However depending on your power upgrades, you may not need the plug I suggested.

Stock equivalent in Copper is a BPR7ES.
http://www.sparkplugs.com/results_cross.asp?pid=bpr7es

What are the mods? Anyway you can get a nice "Macro" picture of the plugs?