View Full Version : fuel regulator

11-12-2005, 11:07 PM
What is the main purpose of the fuel regulator? does it regulate fuel to the rail or back to the tank?

11-13-2005, 09:26 AM
Per service manual, the regulator maintains the pressure to the injectors under all driving conditions and controlls the amount of fuel that is recirculated back to the tank.

11-13-2005, 11:18 AM
To add to that ...

It maintains pressure to the fuel rail using vacuum/boost as a reference and controlling how much drains back in the return line.

The objective is to keep a constant differential pressure across the injectors ... i.e. if the pressure in the manifold rises, the fuel pressure rises to maintain the injector differential pressure.