TanRchy

my buddy has a 99 z28 m6. It has about 60k miles on it, no mods. he just got his oil changed yesterday, and put stp fuel injector cleaner through it. today he has a fair amount of smoke comin out of his pipes at startup and acceleration. normal? the car has no codes but it is slightly sluggish. Normal? i know GM top end cleaner does this but is this normal??

AlonzoVersion 1.0

TTT for you.

LS1derfull

I have never used that stuff but if it works at all you are probably seeing carbon from it working properly. I would keep driving and it should clean up after a hour or so of driving.

TanRchy

thanks. we'll see what happens, its getting better. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />