Have had my turbo kit on now for about 300 miles and i just got a check engine light. The code was P0171, system running to lean. The blue box that i am using(i know) has a green led on it to tell you if its running right, but mine is flashing, im not sure if it is suppost to flash or what. does any one else that is using the blue box know if theres is always green or is also flashing? Also do you think it might be my stock gsr fuel pump not being enough? Maybe its time for a Walbro255? Anybody.....

 

the flashing green LED means its working properly. And usually blue box's make your car run ridiculously rich, not sure why yours is saying lean though... may want to check your wiring on the blue box and injectors

 

weak fuel pump...do you have any additional fueling? hoe much psi are you running?