G 2500 3/4 Ton Van V8-350 5.7L VIN K TBI (1995)
Fuel Pump Relay: Testing and Inspection
TESTING
The fuel pump relay has a connector pigtail located near the relay to assist in testing the system. By applying voltage at this terminal, it can be
determined if the fuel pump will operate. This terminal will also prime the fuel line to the TBI unit.
Refer to Computers and Controls / System Diagnosis / Chart A-5 for diagnosis of the fuel pump relay circuit. See: Powertrain
Management/Computers and Control Systems/Testing and Inspection
SYMPTOMS
An inoperative fuel pump will cause a "no start" condition. A fuel pump which does not provide enough pressure can result in poor performance.
An inoperative fuel pump relay can result in long cranking times, particularly if the engine is cold. The oil pressure switch will turn "ON" the fuel
pump, as soon as oil pressure reaches about 28 kPa (4 psi).
