I hope we-todd-did-racing allow hosting on this website.

Anyways, It's spring so after changing the defective o2 sensor (which cause the car to run extremely rich) last week. I did an oil change and changed the sparkplugs this week. I know the sparkplugs doesnt look good. It's because the car ran very rich for several weeks. That's why I'm changing them. But what surprise me is the sparkplug of the 2nd cylinder is not the same color as the other. It's very white. Is the injector defective?

 

bump would also like to know

 

ttt

 

I dunno what kind of injectors you're running but it could be possible ones clogged?

 

i never get too overly concerened with the color of the ceramic, you need a flashlight to look down into the spark plug, all the way at the bottom you will see a slight "ring" this is where you read the plugs from.

they dont look bad or anything and if you arent use to reading plugs alot i could see your concern from the one being almost new looking on the ceramic

 

it should be fine, theres carbon build up on the threads. I dont think its too lean

 

Looks fine to me, sometimes one or 2 can look different from the others, don't worry too much about it.

 

Thanks guys. I'll run the new plugs for a few days then I take a look at them to see what they look like.

 

your running lean thats why the plugs are white

 

I would run one more test with new plugs, and dont add any fuel additive or octaine stuff and make sure the gaps are all good. Drive it for a week and pull em and check em out again.

 

Trying to "read" sparkplugs that have any more use than 1 pass on them is pretty much a waste of time. The hydrocarbon ring (mentioned above) is going to be an innacurate measure since it is WOT A/F we are concerned with. The color of the ceramic is just a bad measure to go by. The ceramic being glossy or speckeled, however, would be something to consider. The other biggie is the "blueing line" on the ground strap which is another measure that really isn't any good after 1 pass since it is a measure of maximum cylinder temp/pressure.

Throw a fresh set of plugs in, make a WOT pass, yank em, and check em. Let us know how they look.