Posted by EAMONN GREENE on August 12, 2004, 7:16 pm
Hi Techs, I'm having trouble with an Isuzu Trooper 3.0 Diesel Common Rail. I would appreciate a little theory on the system. Does this system have a permanent 12 volt supply at the injectors or does Isuzu use a permanent earth at the injectors and have the ECU switching a positive to the other side of the injector. Also what voltage should one get at the fuel pressure sensor on the fuel rail. With the ignition on and the engine stationary I am getting 2.6v. With the engine cranking I am getting 2.8v at the pressure sensor on the fuel rail. Is there a fuel pressure switch on the pump, I can't find any.Thanks very much. regards Eamonn