3C-28 - FUEL SYSTEMS 90-824052R3 JUNE 2002
Electric Fuel Pump Test
Purpose: This test will determine if electric fuel pump
is capable of producing adequate fuel “pres-
sure” needed for normal engine operation, 36
to 39 psi (248 to 269 kPa).
Procedure A: STEP 1: Connect pressure gauge
to pressure port.
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STEP 2: Put ignition key switch in “ON” position.
OFF
ON
START
STEP 3: Take a fuel pressure reading, within 30
seconds.
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CAUTION
Do not close-off fuel hose completely in step 4, or
damage could result to hose or pump.
STEP 4: Partially close off fuel hose to pressure
regulator.
STEP 5: Look at pressure gauge for increase in
pressure.
Results: Fuel pressure increases as hose is partially
closed off. Electric fuel pump OK, perform
Induction Manifold Leak Check (page
3C-33).
Fuel pressure does not increase when hose is par-
tially closed off. This may indicate defective electric
fuel pump. Before replacing, perform Procedure B
following.
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