90-824052R3 JUNE 2002 FUEL SYSTEMS - 3D-29
Pulse Fuel Pump Delivery Test
Purpose: This test will indicate pulse fuel pump is
capable of supplying the low pressure fuel
route with adequate fuel supply.
1. Remove inlet hose to pulse fuel pump and put
end into clean container.
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2. Squeeze primer bulb several times.
3. Look for fuel flow from hose.
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Results: Fuel flows freely from pulse pump inlet
hose. Remove, disassemble, and inspect
pulse fuel pump (section 3A).
IMPORTANT: All fragments of failed pump must
be located before re-assembly.
No or low fuel flow from pulse pump inlet hose. Check
for restrictions, holes, or loose connections from fuel
supply.
NOTE: Inspect anti-siphon valve on tank.
Final Filter Check and
De-pressurizing EFI System
Procedures
Purpose: Checking the final filter for obstructions,
damage etc. eliminates this component as a
possible source of restriction in the system.
1. De-pressurize EFI fuel system by wrapping a
clean cloth around pressure port valve and
inserting tip of screwdriver into valve, depressing
valve core. Let fuel drain from valve.
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a
a - Pressure Port
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