|
|
| In a C4 Corvette, the fuel pump is one of those crossover items
that is part of both the electrical system and the fuel system.
The pump is a submerged variety, electrically operated, contained
in the fuel tank and somewhat difficult to get to. |
| Although the pump is difficult to physically check, you can
make certain that it at least runs by turning the ignition switch
to on (but don't start the engine). |
|
If the pump motor is working, you will hear
a whirring noise coming from the rear of the vehicle that will
last for 2 seconds. Note that this does not prove that
the pump is actually pumping fuel in sufficient quantity and/or
pressure but it does prove if the pump motor itself is
operating.
|
| If you do not hear any sound, check the fuse labeled "Crank"
on the fuse panel. |
| If the fuse is not blown but there is no sound from the tank
area, there is a problem with either the motor or the wiring feeding
the fuel pump motor. |
|
If the pump appears to be working, you will
need to measure the fuel pressure at the Shraeder valve located
on the fuel rail on the engine. Anything below 35 PSI
is cause for alarm and can be the fuel pump (pumps---2 each---on
a ZR-1), the fuel pressure regulator, the check valves in the
fuel return line, the fuel filter or a obstructed fuel line.
|
|
|
