Filed Under (Ford) by admin on 05-02-2011
1. With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to Section 100-02. 2. Disconnect the battery ground cable. For additional information, refer to Section 414-01. 3. Remove the air cleaner outlet pipe. For additional information, refer to Section 303-12. 4. Remove the spark plugs. For additional information, refer to Section 303-07A. 5. Disconnect the throttle cables. If equipped, disconnect the speed control actuator cable. Disconnect the accelerator cable. 6. Disconnect the catalyst monitor and heated oxygen sensor electrical connectors. Detach the electrical connectors from the bracket. 7. Remove the wiring harness anchors from the valve cover studs and position the wiring harness aside. 8. Remove the valve cover. 1. Remove the studbolts. 2. Remove the bolts. 9. CAUTION: The valve cover sealing surfaces are soft materials. Do not use abrasive grinding discs to remove gasket material. Use only a plastic scraping tool. Do not scratch or gouge sealing surfaces or oil leaks can occur. Clean and inspect the sealing surfaces of the valve cover and cylinder head. Both surfaces must be clean and flat. 10. Remove the catalytic converter. For additional information, refer to Section 309-00. 11. Remove the bolt and nut and position the coolant tube aside. 12. Remove the wheel and tire assembly. For additional information, refer to Section 204-04. 13. Remove the RH lower splash shield. 14. Rotate the crankshaft to just before top dead center (TDC) (No. 1 cylinder).
Filed Under (Ford) by admin on 01-02-2011
WARNING: Do not smoke or carry lighted tobacco or open flame of any type when working on or near any fuel-related components. Highly flammable mixtures are always present and may be ignited. Failure to follow these instructions may result in personal injury. WARNING: Fuel in the fuel system remains under high pressure even when the engine is not running. Before working on or disconnecting any of the fuel lines or fuel system components, the fuel system pressure must be relieved. Failure to follow these instructions may result in personal injury. 1. Disconnect the battery ground cable (14301). For additional information, refer to Section 414-01. 2. Relieve the fuel pressure. For additional information, refer to Section 310-00A (Gasoline) or Section 310-00B (Natural Gas). 3. Disconnect the fuel lines. For additional information, refer to Section 310-00A (Gasoline) or Section 310-00B (Natural Gas). 4. Remove the throttle body (9E926). For additional information, refer to Throttle Body in this section. 5. On gasoline engines, remove the EGR valve to exhaust manifold tube (9D477). For additional information, refer to Section 303-08. 6. Remove the drive belt (8620). For additional information, refer to Section 303-05. Vehicles equipped with natural gas engines 7. Disconnect the fuel temperature sensor connector. 8. Disconnect the fuel pressure sensor connector. All vehicles 9. Disconnect the main fuel shut-off solenoid connector. 10. Disconnect the generator cable, electrical connector, and harness pin-type retainer. 11. Remove the bolts and the generator mounting bracket (10153). 12. Remove the bolts. 13. Unclip the accelerator cable (9A758) and the speed control actuator cable (9A825) from the two crash brackets and position out of the way. 14. Separate the LH heated oxygen sensor and the transmission electrical connector from the bracket at the rear of the cylinder head. 15. Separate the fuel charging wiring pin-type retainer from the crash bracket. 16. 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.
Filed Under (Chevrolet) by admin on 20-01-2011
Tests/Procedures: Potential Causes: 1. Perform a fuel injector balance test for all cylinders. If a fuel injector concern exists, it is possible to misfuel an entire bank of the engine, causing multiple cylinders on the same bank to misfire even though the root cause is a single fuel injector. The engine computer recognizes all the extra oxygen and adds fuel to the engine bank. This is verifiable by higher injector pulse on the affected bank. 2. Use the scan tool to turn off the fuel enable. This is found using the special functions/output controls of the scan tool. This will maintain fuel trim numbers at 0%. Check for the entire bank to stop misfiring and concentrate on a single cylinder misfire. The single cylinder misfire can be the cause of the O2 sensor showing lean exhaust. 3. Check for excessive exhaust backpressure. This can affect only one bank if equipped with 2 catalytic converters. This is often verifiable by reduced injector pulse on the affected bank. 4. Swap the position 1 O2 sensors side to side to see if the misfires move to the other bank of the engine. If so, replace the O2 sensor. 5. Remove bank 1 spark plugs, check for rich or lean plug condition, clean or replace. 6. Disconnect both front O2 sensors, road test. This will also keep the fuel trim numbers at 0%, similar to step #2. 7. Remove both front O2 sensors and road test. This will verify that the exhaust is not only slightly restricted. Restricted Exhaust System Lean Misfiring Cylinder Oxygen Sensor
Filed Under (Buick) by admin on 01-11-2010
REMOVAL PROCEDURE NOTE: The Heated Oxygen Sensor (HO2S) and the Oxygen Sensor use a permanently attached pigtail and connector. Do not remove this pigtail from the Heated Oxygen Sensor. Damage or the removal of the pigtail or the connector could affect the proper operation of the sensor. Take care when handling the HO2S and the O2S. keep the in-line electrical connector and the louvered end free of grease, dirt, or other contaminants. Also avoid using cleaning solvents of any type. Do not drop the HO2S or the O2S. Do not roughly handle the HO2S or the O2S. 1. Disconnect the electrical connector. 2. Raise the vehicle. Refer to Lifting and Jacking the Vehicle. NOTE: The use of excessive force may damage the threads in the exhaust manifold/pipe. IMPORTANT: If the engine temperature is not above 48° (120° ), the C F oxygen sensor will be difficult to remove. 3. Use the J 39194-B in order to remove the heated oxygen sensor (HO2S). INSTALLATION PROCEDURE NOTE: Refer to Fastener Notice in Service Precautions. A special anti-seize compound is used on the oxygen sensor threads. New service sensors should already have the compound applied to the threads. Coat the threads of a reused sensor with anti-seize compound P/N 5613695 or equivalent.
Related entry: insufficient switching repairs
, 2004 volkswagen beetle heated oxygen sensor
, j 39194-b
Filed Under (Suzuki) by admin on 23-10-2010
1. Remove the fuel pump fuse. 2. Start the engine and repeat cranking until the remaining fuel in the fuel line is all consumed. 3. Disconnect the negative battery cable. 4. Drain the engine coolant. 5. Remove the engine beautification cover retaining nut and engine beautification cover. 6. Remove the air filter snorkel. 7. Remove the VIS vacuum tank. 8. Disconnect the fuel pressure regulator vacuum hose. 9. Disconnect the fuel line. 10. Remove the breather hose. 11. Remove the PCV vacuum hose. 12. Remove the air filter outlet hose. 13. 14. 15. 16. Remove the throttle body assembly. Disconnect the charcoal canister purge solenoid connector and hose. Disconnect the Oxygen Sensor(O2S) connector. Disconnect the Manifold Absolute Pressure(MAP) sensor connector 17. Disconnect the Crankshaft Position(CKP) sensor connector. 18. Disconnect the Exhaust Gas Recirculation(EGR) solenoid connector. 19. Disconnect the Camshaft Position(CMP) sensor connector.20. Remove the Intake Air Temperature(IAT) sensor. 21. Disconnect the ignition coil connector. 22. Remove the vacuum hose on the brake booster. 23. Remove the EGR pipe from the intake manifold. 24. Remove the engine coolant temperature sensor.