Briggs & Stratton Vanguard EFI 380000, Repair Manual

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CHECK/RELIEVE FUEL SYSTEM PRESSURE
Safety Precautions
Always observe the following safety precautions before
removing any fuel system components.
WARNING
• Wear proper eye protection.
• Relieve fuel system pressure.
• Be sure there is no open flame or potential
ignition sources in the area.
• When removing a fuel hose or fitting, cover with a
shop towel to catch any fuel leakage.
• Collect any fuel and/or shop towels in approved
containers and dispose of properly.
• Exercise care to keep dirt and debris out of fuel
lines and fuel pump.
• Keep a dry chemical fire extinguisher on hand in
case of emergencies.
Check/Relieve Fuel System Pressure
WARNING
The fuel in the fuel rail is under high pressure.
To avoid an uncontrolled discharge or spray of
fuel, and to reduce the risk of fire and personal
injury, always relieve fuel system pressure before
servicing.
NOTE: Perform all steps if checking fuel system
pressure. If only relieving fuel system pressure, perform
steps 1-3.
1. See
Fuel Pump Module Cover, Removal.
2. Cut cable strap to release fuel pump module
connector conduit from socket/pin housing. Pull out
grey secondary lock and press to disconnect fuel
pump module connector.
3. Crank engine for 10 seconds using electric starter
(or 12 pulls of rewind cord) to relieve fuel system
pressure.
4. Obtain the following tools:
• Briggs & Stratton Fuel Pressure Gauge (Part No.
19627).
• Briggs & Stratton BIG BLOCK Fuel Pressure Test
Adapter (Part No. 19624).
5. Squeeze two tabs on quick disconnect fitting to
release fuel rail from fuel outlet port of fuel pump
module.
NOTE: Wrap shop towel around fitting to catch any
fuel leakage.
6. Install fuel pressure test adapter between fuel rail and
fuel pump module.
7. Remove protective cap from Schrader valve on fuel
pressure test adapter and install fuel pressure gauge.
8. Connect fuel pump module connector. Push in grey
secondary lock to secure.
9. Install new cable strap to secure fuel pump module
connector conduit to socket/pin housing.
10. Cut cable strap to release fuel injector connector
conduit from socket/pin housing. Press latch to
disconnect fuel injector connector.
11. Crank engine for 10 seconds using electric starter (or
12 pulls of rewind cord) to pressurize fuel system.
12. Note the reading of the fuel pressure gauge. Fuel
pressure should remain steady at 38-43 psi (262-296
kPa).
13. Position the clear bleed tube in an approved
container and press the pressure relief button on
the gauge assembly to relieve fuel system pressure.
Fully depress and hold the pressure relief button until
pointer on the dial face is resting on the stop pin.
14. Remove fuel pressure gauge from Schrader valve on
fuel pressure test adapter.
NOTE: A small amount of gasoline may drain from
the Schrader valve when the gauge is removed. Wrap
a shop towel around the valve fitting to catch any fuel
leakage.
15. Install protective cap on Schrader valve.
16. Remove fuel pressure test adapter between fuel rail
and fuel pump module.
17. Firmly push quick disconnect fitting on fuel rail onto
fuel outlet port of fuel pump module. Gently tug on
fitting to verify that it is properly seated and secure.
18. Crank engine for 10 seconds using electric starter
(or 12 pulls of rewind cord) to pressurize fuel system.
Check for fuel leaks.
19. Connect fuel injector connector.
20. Install
new cable strap to secure fuel injector
connector conduit to socket/pin housing.
21. See Fuel Pump Module Cover, Installation.
Not for
Reproduction