Car puff black smoke threw up shifts and at deacceleration
 

My friend was behind me and said my car threw a little puff of smoke after each upshift or when I am deacceleration at high rpms. Wondering if you guys get the same thing

Re: Car puff black smoke threw up shifts and at deacceleration
 

Could be one of the O2's

Re: Car puff black smoke threw up shifts and at deacceleration
 

Thanks for all the replies...it was of great help!

Re: Car puff black smoke threw up shifts and at deacceleration
 

You running rich?

Re: Car puff black smoke threw up shifts and at deacceleration
 

the car doesn't seem to be running rich......no smells.....no smoke on start up.......only mods are cai, gutted cat, gmmg, tb bypass. I only get a small puff of smoke right at redline during the upshift.
Thanks

Re: Car puff black smoke threw up shifts and at deacceleration
 

gutted cat is one of the main reasons , im sure other ppl can chime in on this one

Re: Car puff black smoke threw up shifts and at deacceleration
 

Lt1's are programmed to fatten up the fuel mixture in the rpm.

Re: Car puff black smoke threw up shifts and at deacceleration
 

That's fairly common. I noticed mine does it, especially if I downshift, or let off the gas after accelerating.

Re: Car puff black smoke threw up shifts and at deacceleration
 

my car does it when i go WOT and it downshifts lol, the gutted catt will worsen it , its nothing to worry about untill it starts doing it alot and massive plumes form lol