my car threw the check engine light and its farting like a mother F****.... i have trifecta tune, dejon intake, and custom cat bak exhaust... 3'.... wat is it?

 

check the recirculating hose. I had the same problem of running lean and it was because the recirculating hose wasnt on tight enough.

 

Take it in to a GM dealership and have them scan your ECU with a Tech II...I'm sure they can tell you why you are having problems...

 

was it during a no lift shift?

 

naw....

 

i'd take it to one of the auto parts stores that will scan for free and see what you come up with. could be something simple.

 

What he said. Find out what the code is then you can look for the issue. Breather line could be loose, map sensor problem maybe. Chargepipe or IC leak is possible. Get the code read then let us know which code it is.