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1984-1995 Honda Civic/ CRX Positive Crankcase Ventilation (PCV) System Repair Manual

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Filed Under (Honda Manuals) by admin on 22-04-2012

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The PCV system is designed to prevent blow-by gas from escaping to the atmosphere by drawing it directly into the intake manifold. The PCV valve contains a spring-loaded plunger which is lifted in proportion to intake manifold vacuum. Under high vacuum, blow-by is returned directly to the manifold through the breather chamber and PCV valve with fresh air. When intake manifold vacuum decreases (wide open throttle) and vacuum in the air cleaner increases, the PCV valve closes and the blow-by is returned through the cylinder head cover breather hose and into the air cleaner. The PCV valve also acts as a check valve when the engine backfires to prevent crankcase explosion. Fig. 1: PCV system components-1984-87 1.5L engines Fig. 2: PCV system components-1988-91 1.6L engines Fig. 3: PCV system components-1992-95 engines Fig. 4: PCV system components-1984-87 carbureted engines SERVICE Positive Crankcase Ventilation (PCV) Valve For PCV valve removal, refer to Routine Maintenance of this information. 1. Locate the PCV valve. With the engine running at idle, use pliers to pinch the PCV hose between the valve and the intake manifold. It should be possible to hear the spring loaded valve click shut. 2. If no click is heard, remove the valve from the engine but leave it connected to the intake manifold. A hissing sound should be heard and vacuum should be felt at the valve inlet. 3. If no vacuum is felt, remove the valve from the intake manifold hose. The engine should stall or almost stall. This will indicate a stuck valve or clogged hose. Check the breather hose for clogging or leaks and replace any defective parts. Exhaust Gas Recirculation (EGR) System FUEL INJECTED ENGINES General Information See Figure 3 The Exhaust Gas Recirculation (EGR) system is used to control emissions measured at the tailpipe. Components included are the EGR valve and controls. The EGR system uses a poppet type valve to regulate the amount of exhaust gas flowing into the intake manifold. The flow path is cast into the cylinder head and does not use any external tubing. A control solenoid valve regulates the amount of vacuum to the EGR valve. A Constant Volume Control (CVC) valve provides a constant amount of vacuum to the control solenoid valve over a wide range of engine vacuum. When servicing or repairing any part of the emissions system, it is absolutely essential to check for any obvious mechanical faults or failures. Remember, a trouble code only indicates which sensor or circuit is affected by the problem. Simple mechanical faults such as a vacuum leak or poor electrical connection can cause a fault code. The EGR valve is not simply open or closed but is modulated by controlling the amount of engine vacuum to the valve diaphragm, up to a maximum of 8 in. Hg of vacuum. The EGR valve has a sensor in the top of the valve that reports valve lift to the ECU (same as ECM, 1992-95). The ECU modulates the position of the control solenoid valve to control the EGR valve lift according to an internal program. Upstream of the control solenoid valve, the CVC provides a constant supply of vacuum so EGR control is precise under all manifold vacuum conditions

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

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Filed Under (Honda Manuals) by admin on 03-07-2012

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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

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2003-2007 Accord V6 Power Steering Moans or Whines Repair Manual

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Filed Under (Toyota Manuals) by admin on 02-06-2012

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SYMPTOM A moan or whine is heard when turning the steering wheel when the engine is cold. There may be air bubbles or foam in the power steering reservoir. The noise usually goes away when the engine warms up. PROBABLE CAUSE Air enters the power steering pump through the inlet joint O-ring. CORRECTIVE ACTION Replace the O-ring on the power steering pump inlet joint. PARTS INFORMATION O-ring: P/N 91345-RDA-A01, H/C 8811010 REQUIRED MATERIALS Honda Genuine Power Steering Fluid: P/N 08206-9002, H/C 3747284 (One container repairs about 12 vehicles.) WARRANTY CLAIM INFORMATION In warranty: The normal warranty applies. Operation Number: 5121B5 Flat Rate Time: 0.3 hour Failed Part: P/N 91345-PAA-A01 H/C 5430681 Defect Code: 07408 Symptom Code: 04201 Template ID: 07-086A Skill Level: Repair Technician Out of warranty: Any repair performed after warranty expiration may be eligible for goodwill consideration by the District Parts and Service Manager or your Zone Office. You must request consideration, and get a decision, before starting work. REPAIR PROCEDURE 1. Remove the bolt holding the inlet joint to the power steering pump housing. 2. Place a shop towel under the inlet joint. 3. Twist the inlet joint back and forth until it is loose, then carefully disconnect the joint and point the hose upward to minimize fluid loss. 4. Remove the inlet joint O-ring. 5. Apply power steering fluid to a new O-ring, and install it on the inlet joint. 6. Install the inlet joint, and torque its bolt to 11 N. m (8 lb-ft). 7. Top off the power steering fluid, if needed. Start the engine, and let it idle. Confirm that the noise is gone and that the system is operating properly

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2003 Honda Accord LX REAR DISC BRAKE PADS REMOVAL AND INSTALLATION INSTRUCTIONS

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Filed Under (Honda Manuals) by admin on 31-05-2011

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Removal Raise and support vehicle. Remove wheels. Thoroughly clean outside of caliper to prevent dust and dirt from entering inside. Support caliper with a piece of wire to prevent damage to brake hose. Remove 2 caliper bolts and caliper from bracket. Remove pad shims and pads. Using vernier calipers, measure the thickness of each brake pad lining. Measurement does not include pad backing plate thickness. See DISC BRAKE SPECIFICATIONS . Remove pad retainers. Inspection Clean caliper thoroughly; remove any rust, and check for grooves and cracks. Check brake disc for damage and cracks. Measure brake pad thickness. See DISC BRAKE SPECIFICATIONS . If brake pad thickness is less than service limit, replace pads as a set. Installation 1. Install pad retainers. Apply Molykote M77 compound onto pad side of shim. Wipe excess grease off shim. Keep grease off discs and pads. Install brake pads and shims. Install inner pad with its wear indicator facing downward. If you are reusing pads, install in original position. Rotate caliper piston clockwise into cylinder, then align cutout in piston with tab on inner pad by turning piston back. See Fig. 15 . 2. Lubricate boot with rubber grease to avoid twisting. If boot is twisted, back it out and position properly. Install brake caliper. Install and torque caliper bolts to proper specification. See TORQUE SPECIFICATIONS . Install brake hose onto suspension arm with mounting bolt. After installation, check for leaks. Pump brake pedal several times to seat pads. Bleed brakes as necessary. See BLEEDING BRAKE SYSTEM . WARNING: Frequent inhalation of brake pad dust, regardless of material composition, could be hazardous to your health. Avoid breathing dust particles. NEVER use an air hose or brush to clean brush assembly. Use an OSHA-approved vacuum cleaner. NOTE: Engagement of brake may require a greater pedal stroke immediately after brake pads have been replaced as a set. Several applications of brake pedal will restore normal pedal stroke.

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