The old plugs were NGK R plugs.. http://www.ngksparkplugs.com/techinf...aqresistor.asp

 

Definately not lean. Look at the carbon midway up the ground strap...that's nicely rich. Looks fine to me.

But yeah, lets get you a wideband gauge. Reading plugs is a mad science, and usually onlyi tell you if somethign is HORRIBLE off....for a long period of time.

 

Thanks Sharif!!

BTW I kept getting the P0300 misfire code all the time... and occasionally the /P0172 Bank 1 rich/P0175 Bank 2 rich..

After changing the plugs I havent gotten any code yet!!

 

Hey jay the plugs look pretty good as far as the pics tell.It seems that we need to change plugs a lot sooner the na guys but yours really dont look to bad at all.They do look a little on the rich running side which i agree with sharif thats good.

 

+1 was kinda curious what others were seeing, lol. they look fine considering the mileage and the range of a/f mixtures going from cruise to full throttle with fi. except for one. seems to be extremely shiny/ metallic looking. dunno if that is the one you wiped the oil off of, but i would be concerned with that one. iirc, it was #2 cylinder in your pics.

 

That's great...hope to keeps up.
UTEC plus FI seems to always mean P0300 for a lot of people. It doesnt bother me at all anymore...haha!
The the FCON or Haltech...I have never seen P0300

 

I am tired of NGK plugs which I always get the p0300 code, I am going to try out the E3.68 Plugs. Go to www.e3sparkplugs.com to read on them. I cross referenced the NGK 1 step colder to these and they are supposed to be the same heat range. They are supposed to work with any stock Z also but I am going to go light on them a while to see how they work out. Here is cross reference http://www.e3sparkplugs.com/pdf/e3autocross.pdf, here is the e3.68 catalog/part details to which vehicles the e3.68 matches up to..
http://www.showmetheparts.com/e3sparkplug/#


Here are pics of the NGK plugs I just took out..

They are in order 1, 2, 3, 4, 5, 6

 

hey Jay how much they run u?

 

I paid like 35 with military discount they should be about 45-50 normal bro.

 

good deal. Gonna tell Bobby At CIN Mototrsports to replace mine with these instead of NGKs

 

They look allmost like the Bosch plugs which i wouldnt put in a riding lawn mower.

 

, so far so good..... Ill pull 1 next wk and take a look... Its running flawless so far.... Not even close to a shitty bosch plug btw..

I have 6 new NGK 1 step colder sitting in my garage in case these suck.... Which I doubt..

 

BTW Superchargedg, they added 10whp = same as Stillen SC


http://www.e3sparkplugs.com/mediacenter.php, just watch this........

Some vids tested on a Ls1 block....

 

Lol low blow

 

I fawking love it LMFAO!

 

So far she is doing well....... Still feels like a beast.. Again, Ill pull a plug next wk take a pic and post it.....

 

So far its running perfectly after 1 wk, the water temps started high at first but now have stayed and settled at 170 after warm up.. Oil press at idle stays at 35.. Plug looked good after I pulled it to look at it today..

 

Well, hopefully time will tell if it fixes the p0300 codes...I'm sick of erasing those codes, even though they only happen occasionally...

 

Havent gotten p0300 since the install..... , love startups too..

 

At first glance, that's a lot of grounding strap on that plug and I wonder how that would effect combustion at very high temps/boost levels.

I would like to try a before and after on the dyno. Keep us posted on the P300 codes and start ups. Looks promising.