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cat 3126 fuel pressure regulator

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1998-2000 HONDA Accord L4 Replace the fuel pressure regulator, and reroute the fuel pressure regulator vacuum line

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1. Locate and identify the three vacuum ports on the intake manifold. 2. Disconnect and discard the vacuum hose that connects the fuel pressure regulator to vacuum port C. 3. Plug vacuum port C with the cap from the tube kit. 4. Replace the fuel pressure regulator. Refer to page 11-113 of the 1998-00 Accord Service Manual. 5. Install the new vacuum hose kit using one of the following procedures 1. Remove and discard the cap from vacuum port A. 2. Connect the short vacuum hose to vacuum port A M/T WITH CRUISE CONTROL 2. Disconnect and discard the vacuum hose that connects the fuel pressure regulator to vacuum port C. 3. Plug vacuum port C with the cap from the tube kit. 4. Replace the fuel pressure regulator. Refer to page 11-113 of the 1998-00 Accord Service Manual. 5. Install the new vacuum hose kit using one of the following procedures. Zoom Sized for Print 1. Remove and discard the cap from vacuum port A. 2. Connect the short vacuum hose to vacuum port A. Zoom Sized for Print 3. Anchor the long vacuum hose by attaching it to the rear intake air duct clip and to the cruise control hose. . Route the new vacuum hose to the fuel pressure regulator. Attach the hose to the three rear clips on the engine wire harness cover. Zoom Sized for Print 1. Remove and discard the vacuum hose from vacuum port A. This hose supplies vacuum to the rear engine mount control solenoid. 2. Connect the short vacuum hose from the top of the Y fitting to vacuum port A

2001 Ford F-150 Draining-Coalescer/ Pressure Relief-Natural Gas Bi-Fuel System Repair Manual

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1. Relieve the Bi-fuel system fuel pressure. For additional information, refer to Pressure Relief—Natural Gas Bi-Fuel System. 2. Raise the vehicle on the hoist. For additional information, refer to Section 100-02. 3. NOTE: There is an O-ring attached to the drain plug. The O-ring must be replaced each time the drain plug is removed. Remove the drain plug. 4. Install the drain plug. 5. Lower the vehicle. 6. Pressurize the fuel system. WARNING: It is important that your bi-fuel vehicle be correctly maintained by Ford bi-fuel trained personnel. If a concern occurs, it is important that correctly trained personnel diagnose the cause. If a concern relates to the fuel system, correct part replacement is imperative to keep your vehicle operating at normal performance. Bi-fuel components and gasoline specific components are not interchangeable. If your vehicle is not serviced in accordance with bi-fuel service procedures, damage can occur and your warranty may be invalidated. WARNING: Fuel supply lines are always pressurized. When servicing fuel related components, do not smoke or carry lighted tobacco or an open flame of any type. Flammable mixtures may be present and can ignite, resulting in personal injury. WARNING: The natural gas fuel system is always pressurized to 655 kPa (95 psi) downstream of the fuel pressure regulator and up to 24821 kPa (3,600 psi) upstream of the fuel pressure regulator. Use care when servicing the fuel system or personal injury can occur. WARNING: The natural gas fuel supply manifold is pressurized to 655 kPa (95 psi). Fuel pressure must be relieved prior to any fuel system service. WARNING: The fuel system pressure must be relieved before any component can be removed. The fuel tanks must be evacuated prior to tank removal. Removal of components without pressure relief or tank evacuation can cause natural gas to escape into the air and cause injury or death.

1984-1995 Honda Accord/Prelude In­Tank Fuel Pumps TEST/REPAIR MANUAL

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Carbureted Fuel System GENERAL INFORMATION On these vehicles, the engine management system is considered part of the emission control system. The major components include the carburetor(s), feedback control system, the air injection system, a throttle control system and the EGR system. The system consists of sensors and switches that feed information to the Electronic Control Unit (ECU), which will then operate several solenoid valves to maintain the ideal air/fuel ratio under all conditions. As useful as the tests found in this section are, the first step in repair or service to engine management systems is still to gain as much information as possible about the problem; when and under what conditions it occurs. At highway speed? At idle only? Only under heavy load or hard acceleration? Wet weather? Defining the problem will eliminate many systems from consideration and possibly point to the affected system. Before diving into an extended electrical diagnosis, take the time to review the basics. Check every vacuum line for cracks or leaks. Check every electrical connector for corrosion or loose pins. Quite often, simply unplugging and reconnecting a connector will break up corrosion on the pins and restore the circuit. Watch out for poor grounds, particularly if the car has experienced major bodywork. COMPONENT TESTING Air Injection System The purpose of this system is to supply oxygen to the exhaust stream at a point in the exhaust manifold that is hot enough to burn off some of the hydrocarbon emissions. The main component is an air suction valve. The valve is spring loaded to stay closed, with engine vacuum supplied to a diaphragm that reduces the spring pressure and allows the reeds to open. The ECU regulates the engine vacuum to the diaphragm by operating a solenoid valve. 1. With the engine at normal operating temperature and at idle, remove the air cleaner and listen for a bubbling sound at the air suction port. There should be no sound at idle, meaning the air suction valve is closed. 2. If the noise is heard at the air suction port, disconnect the vacuum hose at the air suction valve and connect a vacuum gauge to the hose. There should be no vacuum. If there is vacuum and the noise stops, the problem is in the control system. If there is no vacuum and the bubbling sound is still there, the air suction valve is defective and must be replaced. 3. To test the valve, draw a vacuum at the air suction valve diaphragm and listen for a bubbling sound at the air suction port. If no sound is heard, the air suction valve or diaphragm is faulty. Throttle Control System

1997 Ford Explorer/ Mountaineer Intake Manifold Upper Repair Manual

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Intake Manifold — Upper 1. Disconnect the battery ground cable. 2. Remove the air cleaner outlet tube; refer to Section 303-12 3. Disconnect the ignition coil electrical connector and the noise suppressor electrical connector. 4. Disconnect the idle air control (IAC) electrical connector. 5. Disconnect the EGR backpressure transducer electrical connector. 6. Disconnect the EVR solenoid electrical and vacuum connectors. 7. Disconnect the brake booster vacuum hose from the upper intake manifold. 8. Disconnect the vacuum connector from the upper intake manifold 9. Disconnect the vacuum connector from the fuel pressure regulator and remove the vacuum harness from the engine. 10. Disconnect the throttle position (TP) sensor electrical connector. 11. Disconnect the hoses from the EGR backpressure transducer ports. 12. Disconnect the six spark plug wires from the spark plugs. 13. Disconnect the spark plug wires from the seven retaining clips. 14. Remove the four ignition coil bolts and the ignition coil from the upper intake manifold. 15. Raise and support the vehicle; refer to Section 100-02 . 16. Access the LH exhaust manifold through the wheel well and disconnect the EGR inlet tube from the exhaust manifold (9430). 17. Lower the vehicle. 18. Disconnect the EGR inlet tube from the EGR valve and remove the EGR inlet tube. 19. Remove the EGR valve bolts and the EGR valve and gasket. 20. Remove the oil level indicator tube bracket nut and remove the oil level indicator tube (6754). 21. Remove the EGR outlet tube bracket stud bolt and remove the EGR outlet tube from the upper intake manifold. 22. Disconnect the accelerator cable assembly from the upper intake manifold bracket. 23. Remove the upper intake manifold nuts and remove the upper intake manifold and gasket. Installation 1. NOTE: Before installing the upper intake manifold, the EGR port must be clean and free of obstruction. Use combustion chamber cleaner and a suitable wire brush to remove carbon buildup from the EGR passages. Clean and inspect all surfaces. Install new seals and new gaskets. Use Metal Surface Cleaner F4AZ-19A536-RA or equivalent meeting Ford specification WSE-M5B392-A to clean the upper and lower intake manifold gasket surfaces. Position the upper intake manifold gasket on the fuel injection supply manifold. 2. Position the upper intake manifold and install the six nuts.

2000 Ford Crown Victoria/ Grand Marquis Intake Manifold – Gasoline Engines Removal and Installation Manual

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Intake Manifold—Gasoline Engines Removal 1. Disconnect the battery ground cable. For additional information, refer to Section 414-01 . 2. Drain the engine cooling system. For additional information, refer to Section 303-03 . 3. Remove the air cleaner outlet tube. For additional information, refer to Section 303-12 . 4. Disconnect the fuel line. For additional information, refer to Section 310-00A or Section 310-00B . 5. Remove the wiper arm and pivot shaft. For additional information, refer to Section 501-16 . 6. Remove the drive belt. For additional information, refer to Section 303-05 . 7. Raise the vehicle on a hoist. For additional information, refer to Section 100-02 . 8. Disconnect the electrical connector at the crankshaft position (CKP) sensor. * Disconnect the pin-type retainer from the A/C compressor bracket. 9. Disconnect the electrical connector from the A/C compressor. 10. Remove the oil bypass filter. 11. Disconnect the oil pressure sensor electrical connector and the power steering pressure (PSP) switch electrical connector. 12. Disconnect the exhaust gas recirculation (EGR) tube from the exhaust manifold 13. Lower the vehicle. 14. Disconnect the two differential pressure feedback EGR hoses. 15. Disconnect the RH heated oxygen sensor electrical connector. 16. Disconnect the fuel charging wiring electrical connectors from the eight ignition coils. 17. Disconnect the fuel charging wiring electrical connectors from the eight fuel injectors. 18. Disconnect the accelerator cable and the speed control actuator cable. 19. Remove the cables from the EGR tube heat shield and position out of the way. 20. Remove the bolts and the EGR tube heat shield. 21. Disconnect the evaporative emissions (EVAP) return tube, the main chassis vacuum supply line, and the EGR valve vacuum supply. 22. Disconnect the positive crankcase ventilation (PCV) tube assembly at two locations and remove. 23. Disconnect the electrical connector from the EGR vacuum regulator solenoid. 24. Disconnect the vacuum line from the EVAP canister purge valve. 25. Disconnect the generator cable and electrical connector 26. Remove the bolts and the generator mounting bracket. 27. Remove the upper radiator hose. 28. Disconnect the electrical connector from the idle air control (IAC) valve and the throttle position (TP) sensor. 29. Disconnect the heater water hose. 30. Disconnect the EGR tube from the EGR valve. 31. NOTE: The LH heated oxygen sensor and the transmission electrical connectors are attached to the wiring bracket and must be separated from the bracket. Remove the wiring bracket. * Disconnect the wiring connectors. * Separate the transmission harness from the stud. * Remove the nut and the bolt and remove the bracket.