will the Greddy blue box work if using Missing link or check valves for MAP?? I'm afraid it wont. My understanding is that it adds fuel based on RPM and MAP, or is it just RPM?

 

i'm not sure...try the blue box w/out the missing link. if you get a CEL as soon as you boost, you need the missing link.

 

Blue box requires unaltered map signal to function properly. It already has a built in map signal clamp so the ecu doesn't go into limp mode when the map sensor sees positive pressure.

 

anks, the problem is, despite my efforts to hook this up correctly, no matter what, I get a CEL and code 3 for MAP sensor.

 

try a different blue box, or just make sure you got the map wire running to the white wire, and the green wire actually running to the ecu.

 

It looks like it is connected correctly. Unfortunately I dont have another blue box to try. Is it possible that my MAP sensor is bad and I didnt notice a problem because the car was NA? I need to pull out the multimeter and check voltage at the sensor.