Concorde V6-215 3.5L SOHC (1996)
Fuel Pressure: Testing and Inspection
Fig. 11 Checking Fuel Pressure at Fuel Rail
WARNING: Release fuel system pressure before testing removing or disconnecting fuel system hoses or components. Service vehicles in well
ventilated areas and avoid ignition sources. Never smoke while servicing the vehicle.
1. Release fuel system pressure before disconnecting a fuel hose. Perform fuel system pressure release.
2. Remove protective cover from service valve on the fuel rail.
3. Connect Fuel Pressure Gauge C-4799B to fuel rail service valve. (Fig. 11).
CAUTION: When using the ASD Fuel System Test, the ASD relay and fuel pump relay remain energized for 7 minutes or until the test is
stopped, or until the ignition switch is turned to the Off position.
4. Place the ignition key in the ON position. Using the DRB tester, access ASD Fuel System Test. The ASD Fuel System Test will activate the fuel
pump and pressurize the system.
5. If the gauge reading equals the specification listed in the Fuel System Pressure chart, further testing is not required. If pressure is not correct,
record the pressure and remove gauge.
6. Ensure fuel does not leak from fuel rail service valve. Install protective cover onto fuel rail service valve.
7. If pressure is below specifications, proceed to Fuel System Pressure Below Specifications. If pressure is above specifications, proceed to Fuel
System Pressure Above Specifications.
Fuel System Pressure Below Specifications
1. If the fuel pressure reading was below specifications, test the system according to the following procedure.
a. Perform Fuel Pressure Release procedure.
Fig. 12 Checking Fuel Pressure Between Pump And Filter
b. Install Fuel Pressure Gauge C-4799 and Fuel Pressure Adapter 6631 in the fuel supply line between the fuel tank and fuel filter (Fig. 12).
c. Using the DRB, with the ignition key in the ON position, repeat the ASD Fuel System Test.
WARNING: Fuel system pressure must be released before a fuel system hose or component is disconnected.
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If pressure is at least 5 psi higher than reading recorded, replace fuel filter.
