[alabamafrog]

Just as for clarity, the Zener mod is just a map fooler. If you run high boost and have trouble with defueling and over boost codes then you may need a map fooler. You can buy a 4.7 volt Zener for around $1 and install in minutes. The factory map sensor is just a pressure sensor with a 0-5 volt output that goes back to the computer. By installing the 4.7 Zener you make the computer see the same voltage as before from 0-4.7 but stick at 4.7 as your boost goes higher, thereby fooling the computer into thinking you are running normal boost and preventing it from defueling. Many folks do this the mechanical way by installing blow off valves or pressure regulators in the map sensor hose. The 4.7v Zener is just a clean, cheap, electrical way of doing the same thing. To hook it you simple splice the banded end of the diode to the LG/BK wire and the other end of the diode to the GY/R wire at the map sensor. There is not really anything to take a picture of, it is so small and insignificant looking.