catless exhaust running rich

[Easton]

Ive searhed but can find an answer, i just got a custom 3in catless exhaust made and its runnung rich. i cant figure out how to make it run normally any help would be appreciated...

 

[Bud92gsx]

No cat means your going to have more black out of the exhaust..Thats what a cat does is cuts down on emissions.

 

[Easton]

oh ok theres no way to get rid of that w/o putting a cat in?

 

[Bud92gsx]

E85 will help with the black smoke.

You could tune for a bit leaner afr..But with no cat, and pump gas there is going to be black shit.

 

[1SIC1Gb]

Yes, Tuning and E85. Just a byproduct of combustion with pump gas.
Very common under boost where you get a "turbo cloud" puff out of the exhaust.