NGK plugs
 

I just changed the plugs in my '04 today and noticed on the driverside all of the plugs had turned a mossy green color on the tips. What could have caused them to turn this color, i've never seen a plugs changed like that. The only reason for changing them was i noticed last night on juice in high rpms the car was breaking up really bad so i let off and called it a night.

Sounds like corrosion. Is this you first time changing your plugs or have you changed them before?

when the plugs turn green, you have heavy oxidation caused by the material of the electrodes oxidizing.

time for new plugs.

Bassman97, no this isnt the 1st time changing them, more like the 3rd or 4th time. I change them pretty regularly with spraying nitrous.

MattJ, Yea i changed all the plugs with NGK's again. I know the was running pretty right due to the exhaust leak on the driverside at the header, and the nasty plugs were on that side. Uner normal N/A diriving the car was fine with plenty of power. When it was on n20 it broke up really bad around 4k last night, but as soon as i let off the button, it was fine all the way to redline. Oh well plugs changed anyway and n20 hit's like a champ upto 6k without any problems.

When you put the coil packs back on, did you put grease at the terminals? I know before you put the packs back on, you have to put the special grease on the ends. However, the exhaust could have had a hand since exhaust gasses are corrosive.