Normal operating fuel pressure is between 60 to 66psi. If it less than that, or cannot maintain that amount, check for a clogged fuel filter first. If the filter can be blown through freely then your problem is a little harder. It may be the fuel pressure regulator or the fuel pump itself. The pump is located in the tank and is available as a modular unit.
It controls / regulates the fuel pressure.
The 1974 Chevy truck has a mechanical fuel pump with a built in pressure regulator.
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The fuel pressure is not adjustable on that vehicle.
The typical fuel pump pressure for a 1997 Chevrolet CK 1500 truck is 50 psi. The high pressure is required to atomize the fuel when it leaves the injectors.
Fuel pressure for a 1997 Chevy S10 with a 4.3L engine requires 60 to 66 psi.
How is the easiest way to change a fuel pump on my k1500 Chevy pickup
The fuel pump is kaput.
use a pressure guage hooked to the scrader port on the fuel line.
The mechanical fuel pump regulates the fuel pressure. This truck is not fuel injected. It has a carburetor.
It is in the throttle body.
From 87 to 95 did not have them. You will have to crack the fuel line alittle to relieve fuel pressure.