Filed Under (Ford) by admin on 15-02-2011
Removal 1. Remove fuel tank (9002) as described. 2. Remove any dirt that has accumulated around fuel pump module retaining flange. 3. Turn fuel pump module locking retainer ring counterclockwise using Fuel Tank Sender Wrench 310-002 (T74P-9275-A) and remove fuel pump module locking retainer ring. 4. Pull fuel pump module sender plate up out of fuel tank until locking tabs for fuel pump module are accessible. Reach through fuel pump module opening, squeeze both locking tabs together and remove fuel pump module from fuel tank . 5. Remove O-ring seal and discard. Installation 1. Clean fuel pump module retaining flange, fuel tank mounting surface and seal ring groove. 2. Apply a light coating of Premium Long-Life Grease XG-1-C or equivalent meeting Ford specification ESA-M1C75-BA on a new O-ring seal to hold it in place during assembly and install O-ring in seal ring groove. 3. Install fuel pump module carefully into fuel tank to make sure that filter, hoses and float rod are not damaged or binding. Align fuel pump module and fuel tank retainer and push fuel pump module into fuel tank retainer. A definite click will be heard when the two tabs on fuel pump module engage the fuel tank retainer. The fuel pump module must be snapped in the retainer with both tabs. Pull on fuel pump module to make sure it is fully engaged. Install fuel pump module sender plate to fuel tank , being careful that locating keys are in keyways and O-ring seal remains in place. 4. Hold assembly in place and install fuel pump module locking retainer ring finger-tight. Make sure that all locking tabs are under fuel pump module locking retainer ring tabs. 5. Secure fuel pump module unit by rotating fuel pump module locking retainer ring clockwise using Fuel Tank Sender Wrench 310-002 (T74P-9275-A) until fuel pump module locking retainer ring contacts the stops. 6. Install fuel tank in vehicle as described. 7. Lower vehicle. 8. Install a minimum of 38 liters (10 gallons) of fuel. Check for leaks. 9. Turn ignition switch to RUN position for three seconds repeatedly (5 to 10 times) until Multiport Fuel Injection (MFI) Fuel Pressure Gauge 310-012 (T80L-9974-B) or equivalent (depending upon application) shows at least 207 kPa (30 psi). Check for leaks at fittings. 10. Remove Multiport Fuel Injection (MFI) Fuel Pressure Gauge 310-012 (T80L-9974-B) or equivalent (depending upon application), start engine and recheck for leaks.
Filed Under (Isuzu) by admin on 23-12-2010
NOTE: 1. Release fuel pressure. See FUEL SYSTEM PRESSURE RELEASE . Install a fuel pressure gauge between fuel pressure regulator and fuel distributor pipe. See Fig. 1 . Bleed air from fuel line going to pressure gauge. 2. Unplug fuel pressure regulator Vacuum Switching Valve (VSV) connector on right side fender skirt. This is a 4-wire connector with Black and Blue wires in harness. PCM controls VSV to cut vacuum to fuel pressure regulator during hot engine starts. 3. Start engine and measure fuel pressure at idle. Disconnect fuel pressure regulator vacuum hose. Note fuel pressure at idle with vacuum hose disconnected (no vacuum). Fuel pressure should be 42 psi (3.0 kg/cm2 ). See FUEL PUMP PERFORMANCE . 4. If fuel pump pressure is low, check for fuel leaks, restrictions in intake side of fuel pump, leaking injectors, faulty pressure regulator or faulty fuel pump. If fuel pressure is high, check for restrictions in return line to tank or faulty pressure regulator. If pressure does not change when pressure regulator is disconnected, replace pressure regulator. 5. Reconnect pressure regulator vacuum hose and check fuel pressure (with vacuum). Fuel pressure should be 35 psi (2.4 kg/cm2 ). Apply battery voltage to VSV connector Blue wire terminal, and ground Black wire terminal (with vacuum). See Fig. 2 . Fuel pressure gauge should read about 42 psi (3.0 kg/cm2 ). If fuel pressure is not within specification, check for defective VSV. 6. Disconnect and plug vacuum hose from fuel pressure regulator. Stop engine and ensure fuel pressure remains greater than 35 psi (2.4 kg/cm2 ) for 4 minutes after engine stops. 7. If pressure drops, check for leaking injectors, faulty pressure regulator or bad check valve in fuel pump. If engine does not start, by-pass fuel pump relay to check for fuel pressure. Remove fuel pump relay from underhood fuse/relay box. Connect a fused jumper wire between terminals No. 1 and 3 of fuel pump relay connector in fuse block. See Fig. 3 and Fig. 4 . 8. If fuel pump does not operate, check for battery voltage to terminal No. 3. If battery voltage is present, check for open in fuel pump circuit. If fuel pump operates with jumper wire installed, check fuel pump relay and relay energizing circuit. Repair as necessary. Begin basic fuel system diagnosis with testing fuel pressure.
Filed Under (Mitsubishi) by admin on 19-12-2010
FUEL PUMP Removal & Installation (Diamante, Eclipse, Galant & Montero) 1) Fuel pump assembly is located inside fuel tank. Release fuel pressure. See FUEL SYSTEM PRESSURE RELEASE. Remove access panel under seat, in trunk or in rear cargo area. Disconnect electrical connectors and fuel hoses at fuel tank. 2) Remove fuel filler hose from fuel tank. Remove fuel pump assembly. To install, reverse removal procedure. Tighten nuts to specification. See TORQUE SPECIFICATIONS. Removal & Installation (Mirage, Montero Sport & 3000GT) 1) Fuel pump assembly is located inside fuel tank. Release fuel pressure. See FUEL SYSTEM PRESSURE RELEASE. Raise vehicle on hoist. Drain fuel into suitable container. Disconnect electrical connectors and breather/fuel hoses at fuel tank. 2) Remove fuel filler hose from fuel tank. Support fuel tank with transmission jack. Remove nuts securing fuel tank. Remove fuel tank from vehicle. Remove fuel pump assembly. To install, reverse removal procedure. Tighten nuts to specification. See TORQUE SPECIFICATIONS. FUEL RAILS & INJECTORS WARNING: Use a rag to cover fuel hose connection before disconnecting high pressure fuel hose at fuel rail. Some residual fuel pressure may still be in system. CAUTION: DO NOT drop injectors while removing or installing fuel rail. Removal (Diamante, Montero Sport 2.4L & 3000GT)
Filed Under (GM) by admin on 27-10-2010
FUEL SYSTEM DESCRIPTION Fuel is drawn by the supply pump through a pre-filter screen in the tank and to the engine through the fuel supply lines. There is no lift pump in the fuel tanks or on the frame. The fuel passes through the base plate of the fuel injector control module (FICM) to cool the module. From the FICM the fuel flows to the fuel filter/heater element housing, which combines a water separator, a prime pump, a fuel heater element and a filter element. The fuel is then delivered to the high-pressure pump. An integrated hand pump is used to prime the fuel system after changing the fuel filter or servicing the fuel system. The fuel injection pump at the front of the engine valley includes the fuel supply pump and the high-pressure pump. If the fuel system is not suppling enough fuel, a driveability concern may occur. If air is being drawn into the fuel injection system, a Cranks But Will Not Run or Hart Start symptom could exist. HIGH PRESSURE SYSTEM The much larger section of the pump assembly is the high-pressure fuel injection pump. The pump is engine-driven by the camshaft gear. From the high-pressure pump, the pressurized flows to the left common fuel rail. A balance pipe from the center of the left rail then feeds the right common fuel rail. Each common fuel rail supplies one bank of 4 fuel injectors. The fuel rail pressure sensor is mounted in the middle of the right common fuel rail. RETURN SYSTEM The fuel return system routes fuel from the fuel injectors and the fuel injection pump. The fuel rail pressure relief valve is located in the rear of the left common rail. The return fuel travels to the fuel cooler and then to the fuel tank. This fuel is used to cool and lubricate the injection pump and the injectors. DIAGNOSTIC AIDS The following conditions may cause an air leak into the fuel supply system: Deformed or cut O-rings at the fuel supply line connections Improperly seated fuel supply line fittings Porous or weathered rubber fuel supply lines
Filed Under (Dodge) by admin on 07-12-2010
1. Remove fuel pump relay from power distribution center at driver’s side front corner of engine compartment, near the battery. Note terminal identification on fuel pump relay. See Fig. 6 . 2. To check fuel pump relay resistance, use ohmmeter and check resistance between terminals No. 85 and 86 on fuel pump relay. Replace fuel pump relay if resistance is not 70-80 ohms. 3. To check fuel pump relay operation, connect ohmmeter between terminals No. 30 and 87A on fuel pump relay. See Fig. 6 . Ohmmeter should indicate continuity between terminals No. 30 and 87A on fuel pump relay. 4. Connect ohmmeter between terminals No. 30 and 87 on fuel pump relay. See Fig. 6 . Ohmmeter should indicate no continuity between terminals No. 30 and 87 on fuel pump relay. CAUTION: DO NOT allow ohmmeter leads to contact terminals No. 85 and 86 on fuel pump relay when fuel pump relay is energized. 5. Connect 16-gauge jumper wire between negative battery terminal and terminal No. 85 on fuel pump relay. Connect 16-gauge jumper wire between positive battery terminal and terminal No. 86 on fuel pump relay. 6. Fuel pump relay should now be energized. No continuity should now exist between terminals No. 30 and 87A on fuel pump relay. Continuity should now exist between terminals No. 30 and 87 on fuel pump relay. Disconnect jumper wires. Replace fuel pump relay if defective. 7. If fuel pump relay or wiring circuit failure exists, a Diagnostic Trouble Code (DTC) will be stored in Powertrain Control Module (PCM). See appropriate G – TESTS W/CODES article.