pepper specks on my itv22
 

i experienced some sputtering and/or mis-firing in 3rd gear at wot.
decided to pull the plugs and noticed some little black specks on the porcelin of each plug. plugs have ~8k miles on them.
i reinstalled the stockers just to see if the misfiring was gone and it was.
should i go 2 ranges colder or what?
i'm running stage1+sfv107 fmic

thanks

Go up one heat range or goto copper ngk!

itv24?
also, what brand and part# for the copper plugs?
thanks

peppering = detonation. Are you seeing lots of KR?

nope....i'm going to do some plug chops and data logging as soon as i get a set of new plugs.
i monitor kr via my dashhawk.

He cant detonate on 2 stage colder plugs esp since he isnt on the stockers.

2 things are happening...

1) Your gap is wrong... try .026
2) Porcelain is cracked.. Densos do this.

Black pepper color on the plugs isnt detonation.. if they were green speckles, than absolutely, but black? Leads me to believe its the gap and the speckles are from arching.

Got pics of the plugs?

i'll get them posted shortly. i'm running itv22..these are 1 step colder correct?
the pic is crappy so you probably wont be able to see much. actually running rich judging by the soot.
http://i281.photobucket.com/albums/k...zda/plugs1.jpg

http://i281.photobucket.com/albums/k...e/100_8937.jpg

Yeah i think, cant fuckin remember densos numbering... but regardless, they are still colder than stock.

Did you gap your plugs at all? .026 is where they should be. Use a feeling gauge and tap the ass end of that plug on the table or concete floor to close it up to correct gap. Measure with feeler gauge.

Re-gapping is probably what needs done. I started to get a stutter in 3rd gear as well then re-gapped an it went away.

post enlarged pics..... speculation based on what a nub sees is pointless.....

post pics

nope...i did not gap them. i just verified the gap at .033-.035.
the specks are most definitely black.

ya man i need close ups.... fucken panoramic shots dont do shit for reading plugs...

good luck

There ya go, close that gap up.

yeah...i know.
thanks anyway.
i'm gonna buy another set, regap them and do some plug chops and logs.

thanks to all for your help.

any update? I will be throwing in a set of itv24's tomorrow and have been stalking the spark plug threads lol. let us know!