I have a MB300D 1989 6 cylinders. It does not start anymore. I checked the solenoid valve of the fuel pump and I am measuring only 7 volts. Shouldn't be 12volts? I have fuel up to the fuel filter and to the front entrance of the fuel pump, but at the injectors just a bit of leakage. What other pneumatic problem may stop the fuel to get into the fuel pump? Can anyone suggest where to find a pneumatic schematic diagram, or a fuel pump diagram? Can anybody suggest and help in this? I would appreciate your help.
Thanks with anticipation
topnelu