So I have a 91 HB that had the D13 carb motor and I swapped in a D15 DPFI for a meer 100 EURO. My problem is that the ECU (OBDII) is flashing 3, 13, 17. I know that 3 is the MAP sensor and 13 is the Atmospheric Pressure Sensor, and 17 is the VSS sensor. My questions is where in the hell is the damn Atmospheric Pressure Sensor located on this damn motor?? I know where the MAP sensor and the VSS sensor are but in my manual it says I have to take it to Honda to have it fixed. Well here in Germany Honda Dealers are kinda rare plus I am a mechanic in the Army so I am sure I can do it myself if I can find the damn thing. Any help would be greatly appreciated! Plan "B"