Look At My Spark Plug

[atey950]

Hey guys, I am not well experienced with analyzing a spark plug.
So I pulled one last night and took a couple pics. Check em out and let me know what you think. The car runs great, but im just looking for some feedback....See my sig for all the mods....

the plugs are DENSO IRIDIUM IT16

 

[Black331Stang]

gonna need a little more info, is that black on it soft, dry, and sooty like??? or another texture?

if it is, looks like u got some carbon deposits.. Did u gap them right?

heres some things that may be causing this:

-prolonged stop and go driving
-wrong heat range
-Rich air/fuel mix
-nasty air filter
-too much retard in the timing
-low compression

i would take out some more plug from different point around the motor and see how they look. Sometimes only a few can be like this b/c of cracked, bad plug wires, cracked distributor cap. So go pull some more and let us know. good luck

Anthony

 

[atey950]

I will pull another one from the other side of the block.
A little history....I bought this car as is back in Dec.
I have only put about 50 miles on it since then. A couple days ago I popped the dist cap off and the cap and rotor are completely shot. The car seems to be running fine, I am just looking to do some routine maintenance getting it ready for spring. So to answer your question about gapping them, I didnt put them in. They were put in at Springfield Motorsports when the car was dynotuned back in February. The black stuff on it is sooty, powdery like.
I will post more pics of the others that I pull.
Are these plugs good? Ever heard of them?