whenever i have my truck on the high hp tune and i throttle it, it seems to blow white smoke it seems. i dont know if the smoke is black but looks white cause sun is shining through it? but if the smoke is white my truck hasnt lost any power.and i have a bosst guage and it still sees 25psi i have my truck at idle seems to haze a little white smoke barrely enough to notice unless your staring at the exhaust. any opinions out there?