Got a 2002 bugeye wrx with full decat and was running fine ( with engine light on ) with the decat , then changed the up pipe and now it keeps going into i think is limp mode and running like crap !!! Wont go above 2500 rpm and cuts out if it does


cheers


tony

 

maf sensor,o2 sensor or maybe just needs a remap
have you also changed the fuel pump and dump valve ?