Its not carbon, he cleaned the hell out of that engine. There is no way that much carbon has been developed since running for 2 or so hours. Keep in mind the car is not smoking at all. Its possible this stuff was in the exhaust, It only started happening after we put the premix in, or maybe we just happened to notice it.. https://www.nopistons.com/forums/pub...1047683561.gif Either way we are going to drain the gas tank and put new premix/gas in..

is there a write up on how to pre mix ?

I beleive there is one in the faq section under oils, anyhow If it doesn't go away when we change the gas/premix then we might start to think twice https://www.nopistons.com/forums/pub...R#>/unsure.png

haha how embarassing! damnit el u gave me the ****** premix, how the hell was i supposed to know it was 10 ****** years old...... anyhow.. um it's not carbon build up cuz i just rebuilt engine. yeah i dunno bout that nasty ****. it's weird cuz i have started the car before and it did not shoot that crap out until i put premix in. but it could possibly be from exhaust but i really don't know why it would break loose now, and yes i have no cats, just mufflers. so anyhow i'm thinkin it was a bi-product of my car being flooded for 15 mins and then run,,,, if that is even possible that such things could form that fast... it's wierd they are like little coals and feel like burned sponges or something, but it's weird cuz when u break them up in your fingers there is no residue like carbon would leave...it's like cristalized

that truely is weird that no one in here has seen anything like it

I forgot that one detail, heavy flooding issues....

lol thanks.... he told us that

yep,,, i just can't wait to see what happens when i start it tomorrow https://www.nopistons.com/forums/pub...IR#>/devil.gif.... we take a vid or somethin it will fun https://www.nopistons.com/forums/pub...#>/biggrin.png

lol.... i'll pray that nothing goes wrong for you

ya, and remember to use the premix that doesn't contain huge chunks of rock. https://www.nopistons.com/forums/pub...1047683561.gif https://www.nopistons.com/forums/pub...1047683664.gif