the best part about using the zener diode is that it allows all the MAP sensor voltages below 4.3V (aka below 13psi) to still function properly. (unlike the resistor type fix that someone came up with)
daily driven at 15psi now, and a couple pulls to 18psi
make sure you use low temp, thin solder for electronics equipments, and a low temp soldering iron. I use a 25watt commercial grade iron, but, some of the cheapos will work too. just make sure you don't feed too much heat into the pins. you should be able to just melt the solder and make the connections. the key is low temp solder and being quick. if you use something too hot, don't blame me.
pull out the ECU from the car. take the cover off.
the zener diode should be soldered in as shown. note that the zener is directional, as indicated by the small line that wraps around the diode. the side with the line is known as the cathode side.
so, on the left hand side, solder the zener to the pin, making sure the line (cathode side) on the zener is facing the pin, then have some wire soldered to the other end of the zener and then solder that wire to the pin on the right side as indicated by the picture.
make sure to route and use the proper amount of wire so as not to apply pressure to the various internal bits on the ecu
Edited by patra_is_here, 19 April 2009 - 05:05 PM.