Hi,
The best thing to do at this point is simply check fuel pressure unless the check engine light is staying on while the engine is running. If that's the case, let me know. Here is a link that explains how it's done:
https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator
and
https://www.2carpros.com/articles/engine-stalls
Here are the directions specific to your vehicle along with the diagnostics. The attached pics correlate with the directions.
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2001 Chevy Truck C 1500 Truck 2WD V8-5.3L VIN T
Fuel System Diagnosis
Vehicle Powertrain Management Fuel Delivery and Air Induction Fuel Pump Fuel Pressure Testing and Inspection Component Tests and General Diagnostics Fuel System Diagnosis
FUEL SYSTEM DIAGNOSIS
DESCRIPTION
When the ignition is turned ON, the Powertrain Control Module (PCM) will turn ON the in-tank fuel pump. The in-tank fuel pump will remain ON as long as the engine is cranking or running and the PCM is receiving ignition reference pulses. If there are no ignition reference pulses, the PCM will turn the in-tank fuel pump OFF 2 seconds after the ignition is turned ON or 2 seconds after the engine stops running.
The in-tank fuel pump is an electric pump attached to the fuel sender assembly. The fuel pump is designed to provide fuel at a pressure above the pressure needed by the fuel injectors. A fuel pressure regulator, attached to the fuel rail, keeps the fuel available to the fuel injectors at a regulated pressure. Unused fuel is returned to the fuel tank by a separate fuel return pipe.
TEST DESCRIPTION
Steps 1-6
pic 1
Steps 7-13
pic 2
Steps 14-19
pic 3
Steps 20-25
pic 4
The numbers below refer to the step numbers on the diagnostic table.
2. This step verifies that the fuel pump is operating.
4. This step tests for an internal fuel leak. If the fuel pressure drops during this test, then an internal loss of pressure is indicated.
6. This step tests the fuel pressure regulator. The fuel pressure regulator is controlled by the engine vacuum. With the engine vacuum applied, the pressure should drop to the specified value.
9. This step inspects the fuel pressure regulator for a fuel leak from the vacuum port. If fuel leaks from the fuel pressure regulator while the fuel pump is commanded ON, replace the fuel pressure regulator.
10. This step tests for a loss of fuel pressure between the fuel feed pipe shut-off adapter and the fuel pump.
11. This step tests for a leaking fuel injector or for a leaking fuel pressure regulator. If the fuel pressure remains constant during this test, the fuel injectors are not leaking fuel.
14. This step tests for a restricted fuel return pipe. If the fuel pressure is within the specified values, there is a restriction in the fuel return pipe.
16. This step determines if the fuel pressure regulator or the fuel pump is the cause of the low fuel pressure. If the pressure rises above the specified value, the fuel pump is OK.
18. This step verifies that a circuit condition is not the cause of a fuel pressure concern. Thoroughly inspect all fuel electrical circuits.
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Let me know what you find or if you have other questions.
Take care,
Joe
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Wednesday, June 17th, 2020 AT 11:15 PM