4D56T mods
Posted: Tue Jan 05, 2010 5:56 pm
Found this on the mighty www......though it interesting
remove the top of the boost compestation device ( top of the diesel pump) and you will find a diaphram, mark the original position then rotate it 90degrees clock wise
if you brave you can lift out the diaphram (noting position) and you will find a star wheel, turn this 180degrees clock wise then refit the diaphram/pin ass to the new 90deg position had earlier.
rotating the diaphram will increase the fueling under boost a lot ( i have mine turned 45deg)
rotating the star wheel will lower the tension of the diaphram and let the boost fueling increase come in earlier
remove the top of the boost compestation device ( top of the diesel pump) and you will find a diaphram, mark the original position then rotate it 90degrees clock wise
if you brave you can lift out the diaphram (noting position) and you will find a star wheel, turn this 180degrees clock wise then refit the diaphram/pin ass to the new 90deg position had earlier.
rotating the diaphram will increase the fueling under boost a lot ( i have mine turned 45deg)
rotating the star wheel will lower the tension of the diaphram and let the boost fueling increase come in earlier
