2500 4x2 Pickup V8-318 5.2L Magnum (1994)
Adapter Tools - Typical Connections
2.
Connect Fuel Line (Tube) Pressure Test Adapter Tool number 6539 (5/16 in.) between the disconnected fuel tube and fuel rail.
3.
Connect the 0-414 kPa (0-60 psi) fuel pressure test gauge (from Gauge Set 5069) to the test port on tool 6631. The fittings on both tools must be in
good condition and free from any small leaks before performing the proceeding test.
4.
Start engine and bring to normal operating temperature.
5.
Observe test gauge.
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Normal operating pressure should be 241-310 kPa (35-45 psi).
6.
Shut engine off.
7.
Pressure should not fall below 24 psi for five minutes.
8.
If pressure falls below 24 psi, it must determined if a fuel injector, the fuel module mounted fuel pressure regulator or a fuel tube/line is leaking.
9.
Again, start engine and bring to normal operating temperature.
10.
Shut engine off.
11.
Checking for fuel injector leakage: Clamp off the rubber hose portion of tool 6539 between the disconnected fuel tube (line) and test port inlet.
If pressure now holds at or above 24 psi, a fuel injector or the fuel rail is leaking.
12.
Checking for fuel pressure regulator or fuel tube leakage: Clamp off the rubber hose portion of tool 6539 between the fuel rail and test port
inlet. If pressure now holds at or above 24 psi, a leak can be found at a fuel tube/line. If no leaks are found at fuel tubes, replace the fuel filter/fuel
pressure regulator.
