MODEL : LEGACY RELEASE : June 2006

Engine TOP Visual Contents Index DTC Wiring Diagram IGNITION(H4DO) STARTING/CHARGING SYSTEMS(H4 MECHANICAL(H4DOTC) > Intake Manifold (FUEL SYSTEMS)(H INSPECTION EMISSION CONTROL (AUX. EMISSIO INTAKE (INDUCTION)(H4DOTC) 1. Remove the collector cover. MECHANICAL(H4DOTC) 2. Warm-up the engine. General Description 3. Disconnect the vacuum hose from intake manifold, and then install the Compression vacuum gauge. Idle Speed 4. Keep the engine at idle speed and read the vacuum gauge indication. By observing the gauge needle movement, the internal condition of the engine Intake Manifold Vacuum can be diagnosed as described below. INSPECTION Engine Oil Pressure Fuel Pressure Valve Clearance Engine Assembly Engine Mounting Preparation for Overhaul V-belt Crank Pulley Vacuum pressure (at idling, A/C “OFF”): Cover Less than −70.6 kPa (−530 mmHg, −20.85 inHg) (MT model) Less than Timing Belt −68.0 kPa (−510 mmHg, −20.08 inHg) (AT model) Cam Sprocket Diagnosis of engine condition by measurement of intake manifold Crank Sprocket vacuum Head Vacuum gauge indication Possible engine condition Cylinder Block 1. Needle is steady but lower than normal position. Leakage around intake Intake and Exhaust Valve This tendency becomes more evident as engine manifold gasket, or temperature rises. disconnected or damaged vacuum hose 2. Needle intermittently drops to position lower than Leakage around cylinder Engine Trouble in General normal position. INSPECTION 3. Needle drops suddenly and intermittently from Sticky valve Engine Noise normal position. INSPECTION EXHAUST(H4DOTC) 4. When engine speed is gradually increased, needle Weak or broken valve COOLING(H4DOTC) begins to vibrate rapidly at certain speed, and then springs LUBRICATION(H4DOTC) vibration increases as engine speed increases. SPEED CONTROL SYSTEMS(H4DOTC 5 Needle vibrates above and below normal position Defective or