Direct Fuel Injection
90-8M0050731 MAY 2011 Page 3B-25
Electric Fuel Pump Pressure Tests
Low‑Pressure Boost Pump Test
1. Remove the fuel outlet hose from the low‑pressure boost pump and install a short piece of hose (obtain locally) onto the fuel
pump outlet fitting.
2. Install a Schrader valve T‑fitting between the hose removed from the pump and the fuel hose installed on the pump. Secure
the hose connections with cable ties.
3. Connect a pressure gauge to the Schrader valve T‑fitting.
4. Turn the ignition key to the "ON" position. The pressure must be within the specifications.
a - Outlet fuel hose
b - Boost pump
c - Fuel hose
d - Schrader valve
Low‑Pressure Electric Fuel Pump (Boost Pump)
Low‑pressure fuel pump output 41–62 kPa (6–9 psi)
Schrader Valve Tee 22‑849606
Digital Pressure Meter 91‑892651A01
Dual Fuel/Air Pressure Gauge Kit 91‑881834A 1
Fuel Pressure Gauge Kit 91‑881833A03
High‑Pressure Fuel Pump
1. Install the pressure gauge assembly to the port fuel rail pressure test valve.
2. Start the engine, or crank the engine for 15 seconds with the starter motor. The fuel pressure on the gauge must be within
specifications.
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