hey guys i havent went wot on my truck for a couple of days.. so during the night there was a car behind me on my right where my exhaust exits.. i floored it from 20mph so it went back a gear.. when i looked on my right mirror i saw a puff of smoke coming out, it was more like vapor so seems like it had a form of liquid too.. i tried doing it again and it didnt do it. any ideas?

 

Maybe running too rich?

 

no the afr is @ 12.5-12.8