White on Spark plug?

[pj_rage]

What does it mean if the strap of your spark plug is white? One of my 8 NGK TR6 plugs was white on the strap when I removed it. Not sure if I should be worried or not :shrug:

If it means I was running lean, it could be from before I was tuned with Jon, and was running the general pulley tune that I got with the Xcal2.

I'll probably have to keep an eye on it.

 

[RedfireBeast]

What type of fuel do you run and what's your A/F at?

 

[TRBO VNM]

when did you pull the plugs? if it was after cruising or just idling they would look like that. to really check them based on rich/lean when WOT you actually need to make a WOT pull/run and then shut the car down ASAP and then pull them. you can't go WOT and then cruise 5 miles home or whatever.

 

[pj_rage]

Last thing done to the car was running to the grocery or something quick, no WOT, got home and pulled off the pullies. I wasn't pulling them just to check if I had a problem, just noticed it and wondered if I should be worried a little. I forgot that it only matters if you pulled them right after WOT.

Fuel is 93 octance, A/F should be at 11.5, but that is a long story in itself :rolling:

 

[I-CAN-STANG]

white = lean

 

[IronTerp]

Hmmmmmm, interesting. What number was it? Probably worth looking into a little. Hearing more and more about individual fuel injectors with different flow characteristics.

Andrew, you going to be able to make it tomorrow?

 

[pj_rage]

Unforunately, I can't make it tomorrow

Not sure the cylinder number but it was the back left + 2 cylinder.

That is:

REAR
*_____*
*_____*
X_____*
*_____*
FRONT

 

[TRBO VNM]

if I understand your diagram it is # 2 cylinder.

but yes, as dwight said people have been having issues with injectors as well. however, I have only heard of it with the 60's.

why can't you make it tomorrow?

 

[N2DAMYSTIC]

Here is a link for you regarding Plug reading

http://www.empirenet.com/pkelley2/sparkplugreading.html

 

[pj_rage]

I have last minute business travel all this week so I'm spending some quality time with the girlfriend... She has some other obligations for a bit today so she couldn't come with :shrug: