Well I just changed out my spark plugs, here are my old ones, does the color of the plugs say anything?



sorry about the size

 

The left two are my trailing and the right two are leading

 

Looks normal to me. Mine look the same way. Are you premixing?

 

I don't see anything terribly wrong there...doesn't look like its been pig rich or anything too crazy...

how long were those plugs ran for?

 

normal....

 

The leading plugs look great with the brown/tan color on the center insulator. Can't really see the center insulators on the trailing plugs, but if they are the same/similar color, reinstall them.

Like classicauto asks, how many miles on the plugs?

 

he says , no premix, 8 months on plugs

 

by the sounds and looks of it - youve got a strong runner

 

Good for an NA, probably a little lean for a modded t2

 

wow, cause my car is definately running rich as Im getting terrible milage

 

Rich will show up as a light chalky black carbon deposit most of the time. Tan is stoich/lean most of the time. It's normal for a moderately rich running engine to have tan center surrounded by black carbon, but I see hardly any carbon at all there. So it isnt running rich, by the plugs anyway.

 

Heh, mine looked like that and I thought something wrong.. so I tossed new ones in... glad to hear my NA is still doing good and I don't have any odd **** gettin burnt up in there...

 

are they sapposed to be brown like that? the only plugs i've seen are fouled ones

 

They are just about perfect.
If anything, the gasoline you're using has a lot of "additives" in it - i.e. lots of brown / tan deposits...but if we're talking about 10k+ miles, then that explains it.


-Ted

 

Good tune - plugs about worn out.

 

the car isnt tuned though

 

LoL
Well it is certainly running properly!

 

I think he means a good air-fuel mixture and good spark. Not the someone did any special tuning on the car. Could be the default tune.

 

In general, spark plugs show how the tune was just before it was shut off.

It can be running way rich at WOT, but as you cruise up the street & pull in the driveway, the idle tune will color the plugs.

To check WOT tune, do a WOT pull & then shut down, coast to the side, pull the plugs right there.