hi a bit of help needed. lately my car has been smelling of fuel coming from the exhust and quite lumpy on tick over. i have had no engine light come on but i done a fualt code check and got 1 slow flash and 5 quick flashes which i think comes back as number 2 injector so would this cause the the fuel smell and lumpy tick over. the car is a 2001 v7 sti jdm any thought would be grate. thanks ady