Engine Controls - Remove/install/overhaul Acura SLX I

INTRODUCTION

Removal, overhaul and installation procedures (when given by manufacturer) are covered in this article. If component removal and installation is primarily an unbolt and bolt-on procedure, a torque specification may be all that is furnished.

Scheme 1

1. Remove negative battery cable. Remove crankshaft position sensor wiring connector located on right side of block, behind motor mount. (Scheme 1)
2. Remove sensor mounting bolt and sensor. Before installing new sensor, inspect "O" ring for damaged or wear and replace if necessary.
3. To install, lubricate "O" ring with engine oil and reverse removal procedure. Tighten bolt to specification. See «TORQUE SPECIFICATIONS»(/acura/slx/i-1995-1999/remont/removal-installation/#engine-controls-removeinstalloverhaul__torque-specifications). NOTE: Ensure CKP sensor is fully seated and held stationary in front cover. Erratic operation and setting of false codes may result if not seated properly.

Removal & Installation

1. Remove negative battery cable. Remove camshaft position senor wiring connector. Remove sensor mounting bolt and sensor from left timing belt cover.
2. Before installing new sensor, inspect "O" ring for damaged or wear and replace if necessary.
3. To install, lubricate "O" ring with engine oil and reverse removal procedure. Tighten bolt to specification. See «TORQUE SPECIFICATIONS»(/acura/slx/i-1995-1999/remont/removal-installation/#engine-controls-removeinstalloverhaul__torque-specifications) .

KNOCK SENSOR (KS)

Note. DO NOT apply thread sealant to sensor threads. Sensor is coated at factory and applying additional sealant will affect sensor's ability to detect detonation.

1. Allow engine to cool and drain cooling system. Remove upper and lower intake manifold. See «UPPER INTAKE MANIFOLD»(/acura/slx/i-1995-1999/remont/removal-installation/#engine-controls-removeinstalloverhaul) and «LOWER INTAKE MANIFOLD»(/acura/slx/i-1995-1999/remont/removal-installation/#engine-controls-removeinstalloverhaul) .
2. Remove front bolt from bracket that secures upper coolant pipe. Remove by-pass hose from upper coolant pipe. Remove upper radiator hose. Remove securing bracket rear bolt, upper coolant pipe and knock sensor.
3. To install, reverse removal procedure. Lubricate "O" ring seal on end of coolant pipe with fresh engine coolant. Tighten all assembly retaining bolts and knock sensor to specification. See «TORQUE SPECIFICATIONS»(/acura/slx/i-1995-1999/remont/removal-installation/#engine-controls-removeinstalloverhaul__torque-specifications) .

1. Disconnect negative battery cable. Remove connectors from VCM. Remove mounting hardware. Remove VCM from engine compartment. Remove VCM access cover. Remove calibration PROM by squeezing each end of Blue PROM and pull upward. Inspect alignment notches of KS calibration PROM and set aside DO NOT open KS PROM. NOTE: Replacement VCM is supplied without a KS calibration PROM. KS calibration PROM must be removed from defective VCM. Use of unapproved KS calibration sensor PROM removal methods may cause damage to KS Calibration PROM or socket.
2. To install, align notches of KS calibration PROM and socket. Gently press on ends of KS calibration PROM until firmly seated and click is heard. To complete installation, reverse removal procedure.

FUEL SYSTEM

FUEL SYSTEM PRESSURE RELEASE

1. Loosen fuel filler cap to relieve tank pressure. Remove fuel pump relay. See «FUEL PUMP RELAY LOCATION»(/acura/slx/i-1995-1999/remont/removal-installation/#engine-controls-removeinstalloverhaul) .
2. Start engine and allow it to run until it stalls. Loosen hose clamp of fuel line on side of pressure regulator coming from fuel line inlet distributor pipe.
3. Cover fuel hose using a shop towel. Slowly pull hose from pressure regulator to relieve fuel pressure. When fuel stops leaking, reinstall hose and clamp. FUEL PUMP RELAY LOCATION Model Location Trooper SLX In Right Fenderwell Relay Box

1. Remove negative battery cable. Remove gas cap. Drain fuel tank by removing fuel tank drain plug. Replace fuel tank drain plug.
2. Disconnect fuel tank wiring connectors and evaporative hoses. Remove fuel filler hose. Remove fuel pressure and return lines. Remove fuel tank. Remove sending unit screws and fuel pump.
3. To install, reverse removal procedures. Tighten sending unit screws. Ensure fuel tank drain plug is tightened to specification. See «TORQUE SPECIFICATIONS»(/acura/slx/i-1995-1999/remont/removal-installation/#engine-controls-removeinstalloverhaul__torque-specifications) .

FUEL RAIL & FUEL INJECTORS

Note. Each injector is calibrated for a specific flow rate. When replacing fuel injectors, order replacements with identical part number as old injectors.

Scheme 2

1. Relieve fuel pressure. See «FUEL SYSTEM PRESSURE RELEASE»(/acura/slx/i-1995-1999/remont/removal-installation/#engine-controls-removeinstalloverhaul__fuel-system-pressure-release). Disconnect negative battery cable. Remove upper intake manifold. See «UPPER INTAKE MANIFOLD»(/acura/slx/i-1995-1999/remont/removal-installation/#engine-controls-removeinstalloverhaul). Disconnect fuel lines. Disconnect fuel injector electrical connectors. Remove fuel line bracket from lower intake manifold.
2. Remove fuel rail bolts. Remove fuel rail. Remove injector retainer clip. Remove fuel injector assembly. Remove "O" rings from injector. (Scheme 2)
3. To install, reverse disassembly procedures. Install NEW "O" rings on injector and lube with engine oil. Install injector into fuel rail using NEW retainer clips. Coat end of injector with engine oil. Install fuel rail. Install upper intake manifold. Tighten bolts and nuts to specification. See «TORQUE SPECIFICATIONS»(/acura/slx/i-1995-1999/remont/removal-installation/#engine-controls-removeinstalloverhaul__torque-specifications).

Removal

1. Disconnect the negative battery cable.
2. Remove the fuel filler cap.
3. Disconnect the fuel line from the fuel filter on the engine side.
4. Disconnect the fuel line from the fuel filter on the fuel tank side.
5. Remove the bolt on the fuel filter holder.
6. Remove the fuel filter.

Inspection

1. Replace the fuel filter when the following occur: Fuel leaks from the fuel filter body. The fuel filter body is damaged. The fuel filter is clogged with dirt or sediment.
2. If the drain hole is clogged, clean the drain hole with air.

Installation

1. Install the fuel filter in the correct direction.
2. Install the bolt on the fuel filter holder.
3. Connect the fuel line on the engine side.
4. Connect the fuel line on the fuel tank side.
5. Install the fuel filler cap.
6. Connect the negative battery cable.

1. Relieve fuel pressure. See «FUEL SYSTEM PRESSURE RELEASE»(/acura/slx/i-1995-1999/remont/removal-installation/#engine-controls-removeinstalloverhaul__fuel-system-pressure-release) . Disconnect negative battery cable. Disconnect air cleaner duct from throttle body. Disconnect electrical connectors (TPS, IAC, and IAT if applicable). See «UPPER INTAKE MANIFOLD»(/acura/slx/i-1995-1999/remont/removal-installation/#engine-controls-removeinstalloverhaul) .
2. Disconnect accelerator cable from throttle body. Remove throttle body from intake chamber.
3. To install, reverse removal procedure. Tighten bolts to specification. See «TORQUE SPECIFICATIONS»(/acura/slx/i-1995-1999/remont/removal-installation/#engine-controls-removeinstalloverhaul__torque-specifications) . Adjust accelerator cable. See «ACCELERATOR CABLE»(/acura/slx/i-1995-1999/remont/removal-installation/#engine-controls-removeinstalloverhaul) .

1. Oxygen sensors (4) are mounted in exhaust pipe before and after catalytic converters. Sensor is equipped with a permanent pigtail, which must be protected from damage when sensor is removed.
2. Ensure sensor is free of contaminants. Avoid using cleaning solvents of any type. Sensor may be difficult to remove if engine temperature is less than 120°F (48°C). If re-using sensor, always use anti-seize compound on threads before installation. Tighten sensor to specification. See «TORQUE SPECIFICATIONS»(/acura/slx/i-1995-1999/remont/removal-installation/#engine-controls-removeinstalloverhaul__torque-specifications) .

1. Disconnect negative battery cable and IAC electrical connector. Remove hold-down bolts and IAC valve from throttle body.
2. Using carburetor cleaner, clean IAC valve "O" ring sealing surface, pintle valve seat and air passage.
3. When installing new IAC, inspect IAC valve "O" ring and check distance between tip of pintle and mounting flange. If measurement is greater than 1.1" (28 mm), apply finger pressure and retract valve to 1.1" (28 mm). To install, reverse removal procedure and tighten bolts to specification. See «TORQUE SPECIFICATIONS»(/acura/slx/i-1995-1999/remont/removal-installation/#engine-controls-removeinstalloverhaul__torque-specifications) .

Adjusting Cable At Throttle Body

1. Loosen adjusting and jam nuts. Pull on cable while fully closing throttle valve. Tighten adjusting and jam nuts.
2. Loosen adjusting nut by 3 turns and tighten jam nut again. Valve lever must return up to stopper screw. If valve lever does not reach stopper screw, repeat adjustment procedure.

Disconnect TP sensor connector and remove mounting screws. To install, reverse removal procedure. For TP sensor or TVS adjustment. See ADJUSTMENTS article.

1. Disconnect negative battery cable. Remove fuel rail and spacers that are located where fuel rail through-bolts enter manifold.
2. Remove lower intake manifold nuts and through-bolts. Remove lower intake manifold from engine, and cover intake openings.
3. To install, reverse removal procedure. Tighten bolts to specification. See «TORQUE SPECIFICATIONS»(/acura/slx/i-1995-1999/remont/removal-installation/#engine-controls-removeinstalloverhaul__torque-specifications) .

1. Disconnect negative battery cable. Remove throttle cable assembly. Disconnect PCV hose, EVAP canister vacuum hose and vacuum booster hose.
2. Disconnect electrical connectors from ignition control module, linear EGR valve, MAP sensor, EVAP canister purge valve, TP sensor, IAT sensor and IAC valve. Remove EGR supply tube and bracket. Remove throttle body. See «THROTTLE BODY»(/acura/slx/i-1995-1999/remont/removal-installation/#engine-controls-removeinstalloverhaul) . Move throttle body and wire aside.
3. Remove MAP sensor and bracket. Remove bolts and nuts securing manifold and PCV fresh air tube bracket. Lift manifold straight up, and cover intake openings.
4. To install, reverse removal procedure. Tighten bolts to specification. See «TORQUE SPECIFICATIONS»(/acura/slx/i-1995-1999/remont/removal-installation/#engine-controls-removeinstalloverhaul__torque-specifications) .

TORQUE SPECIFICATIONS

TORQUE SPECIFICATIONS

See also:
• ADJUSTMENTS
• TORQUE SPECIFICATIONS
• UPPER INTAKE MANIFOLD
• FUEL SYSTEM PRESSURE RELEASE