PleasureCraft Engine Group 5.0L, Diagnostic Manual

Page: 47 / 337

5.0/5.7L Fuel Metering System 3A - 7
MEFI 4 - PCM
Figure 3-9 - Fuel Rail and Throttle Body Assemblies
2. Loosen fuel filler cap to relieve any tank vapor
pressure.
3. Connect fuel pressure gauge J 34730-1 to fuel pressure
connector assembly. Wrap a shop towel around fi tting
while connecting the gauge to avoid any spillage.
4. Install bleed hose into an approved container and open
valve to bleed system pressure. Fuel connections are
now safe for servicing.
5. Drain any fuel remaining in the gauge into an approved
container.
Flame Arrestor
Remove or Disconnect
1. Flame arrestor retaining clamp.
2. Flame arrestor.
Inspect
•
Flame arrestor element for dust, dirt or water. Replace
if required.
Install or Connect
1. Flame arrestor to throttle body.
2. Flame arrestor retaining clamp to fl ame arrestor.
Fuel Control On-Board Service
The following is general information required when working
on the fuel system:
•
Always keep a dry chemical fire extinguisher near
the work area.
•
Fuel pipe fittings require new O-rings when
assembling.
•
Do not replace fuel pipe with fuel hose.
•
Always bleed off fuel pressure before servicing any
fuel system components.
•
Do not do any repairs on the fuel system until you
have read the instructions and checked the fi gures
relating the repair.
•
Observe all notices and cautions.
Fuel Pressure Relief Procedure
Tool Required:
J 34730-1, Fuel Pressure Gauge
Important
•
Refer to manufacturer’s warnings and cautions before
proceeding.
1. Disconnect negative battery cable to avoid possible
fuel discharge if an accidental attempt is made to
start the engine.