41 to 47 psi, pump running, engine off.
60 to 66 psi.
60 to 66 psi with pump running, key on, engine off.
The 99 Chevy S10 does not have a fuel pump reset button. The pump is controlled by the relay unit.
The fuel pressure range for a 99 Astro van is between 40 and 45 psi. The fuel pressure regulator is located at the back of the motor.
Under the hood in the fuse/relay center.
You are probably hearing the fuel pump, this is normal.
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The pressure regulator is located on top of the intake manifold on the fuel rail
The fuel pressure regulator is built into the top of the fuel pump module in the tank.
fuel injectors could be clogged
On the top of the fuel tank towards the front.
Find the s10's ac drier. On the side of the drier there is a port. This is the low pressure ac port.