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2002 Chevrolet Tahoe – 4WD Fuel Line Disconnect Tool for Fuel Filter Removal/ Installation Procedure on 5.3L Flexible Fuel Engine

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2. Install the J 34730-1A . 3. Loosen the fuel fill cap in order to relieve fuel tank vapor pressure. 4. Open the valve on the J 34730-1A in order to bleed the system pressure. The fuel connections are now safe for servicing. 5. Drain any fuel remaining in the gauge into an approved container. 6. Once the system pressure is completely relieved, remove the J 34730-1A . 7. Raise and suitably support the vehicle. Important Clean the fuel filter connections and surrounding area before disconnecting the fuel lines in order to avoid possible fuel system contamination. 8. Using a flare nut wrench and a backup wrench, disconnect the fuel line fitting from the fuel filter. 9. Pull the quick-connect fitting back until the internal retainers hit the filter stop. 10. Twist one end of the J 46363 – Fuel Line Disconnect Tool and insert it between the quick-connect fitting and the filter. 11. Twist the opposite end of the J 46363 – Fuel Line Disconnect Tool and insert it between the quick-connect fitting and the filter. 12. Once the J 46363 – Fuel Line Disconnect Tool is inserted, ensure the tool is parallel to the filter and the fitting. 13. While holding the filter, push the quick-disconnect fitting towards the filter in order to disconnect the quick- connect fitting. 14. Remove the quick-connect fitting from the filter. 15. Remove the filter from the bracket. 16. Install the new fuel filter, P/N 15173334 or P/N 25164003 (A/C Delco P/N GF847), to the bracket. 17. While holding the filter, push the fitting towards the filter in order to connect the quick-connect fitting. 18. Using a flare nut wrench and a back up wrench, connect the fuel line fitting to the filter. 19. Position the fuel sensor bracket into place and install the two nuts. Tighten Tighten the two nuts to 17 N·m(13 lb ft). 20. Lower the vehicle. 21. Tighten the fuel cap. 22. Connect the negative battery cable.

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

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

2004 Audi A4 L4-1.8L Turbo FWD Fuel Pump Removal And Installation Manual

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FWD Notes Removing And Installing Fuel Pump CAUTION: To remove the Fuel Pump (FP), the fuel tank may only be filled to a maximum of 3/4. Empty fuel tank if necessary. Recommended special tools and equipment 3087 wrench for tank sensor VAS5190 fuel siphoning device Empty fuel tank Observe safety precautions. Observe rules for cleanliness. CAUTION: Observe safety precautions when disconnecting the battery. Disconnect battery Ground (GND) strap with the ignition switched off. CAUTION: Secure Ground (GND) wire of VAS5190 to a blank portion of the chassis. Pull cone piece -2- from shaft piece -1- of VAS 5190. Using insulating tape, apply a mark -arrow- on hose at length a = 1465 mm from end of suction hose. Remove fuel filler cap from fuel filler tube Screw shaft piece -1- of VAS 5190 fuel siphoning device on to fuel filler tube of fuel tank . Now slide suction hose as far into fuel tank until the mark applied earlier -arrow- stands on shaft piece. NOTE: If using a siphoning device without shaft piece, proceed principally in the same manner In this case, apply a mark -arrow- on hose at length a = 1400 mm from end of suction hose using insulating tape. The suction hose is inserted correctly when the marking applied earlier stands opposite the lip of fuel filler tube. If the hose can only be inserted with difficulty, smear it thinly with engine oil. Never use lubricants containing silicon. Drain fuel tank through fuel filler tube. Carefully remove siphoning hose. Removing Sedan: Remove luggage compartment lining. Push forward the right backrest of rear seat, if necessary. Avant: Remove left 1/3 backrest. Remove left side trim in luggage compartment and dirt tray. All: Remove cover for connector flange (arrows). Release and disconnect harness connector -1-. Disengage electrical harness connector -2- and lay it aside. CAUTION: Work on the fuel system must only be performed when engine is cold. Fuel system is under pressure. Before opening system, place rags around the connection area. Then release pressure by carefully loosening connection Mark and disconnect fuel supply line -1- and fuel return line -3- (press release tab). Disconnect ventilation line -2- (press release button).

VP44 Fuel Pump Can Not Reach Commanded Timing

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check to see if the fault code is active at engine start-up. Conditions Turn keyswitch ON. Action Check to see if the fault code is active at engine start-up. Use INSITE™ electronic service tool to read active fault codes. Note: If Fault Code 368 is inactive, but other fault codes are active, troubleshoot the active fault codes. OK NOT OK Fault Code 368 inactive Fault Code 368 active and no other active fault codes present Applicable fault code(s) Go to 2A Guided Step 2 – Perform low pressure system checks. Guided Step 2A – Record findings for inlet restriction. Conditions Turn keyswitch OFF. Action Install a restriction gauge at the lift pump inlet. Install a pressure gauge at the fuel filter inlet. Refer to Procedure 005-045 (Fuel Lift Pump) in Section 5 in the Troubleshooting and Repair Manual, ISB and QSB5.9 Engines, Bulletin 3666193. Install a clear line at the fuel filter outlet and run the line into a bucket. With gauges and the clear line in place, bump the starter and leave the keyswitch ON. The lift pump will run for 25 to 30 seconds. While the
lift pump is running, record the inlet restriction. Note: Steps 2A through 2D can be observed and recorded with a single bump of the starter. OK NOT OK Restriction less than 152 mm Hg [6 in Hg] Inlet restriction greater than 152 mm Hg [6 in Hg] Find source of excessive restriction between the lift pump inlet and fuel tank. Fix the source of excessive restriction