Engine Controls - Remove/install/overhaul - 3.4l/5.7l Chevrolet Camaro IV

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, only a simple torque specification may be supplied.

POWERTRAIN CONTROL MODULE (PCM)

STATIC CHARGE (VOLTS)

Scheme 1

Note. Before replacing PCM, carefully inspect all wiring and control components. Failure to test for short circuits may result in repeated PCM failure due to grounds and Quad-Driver failure. To prevent internal damage to PCM, ensure ignition switch is in OFF position when disconnecting or reconnecting PCM connectors or 12-volt components.

Note. When replacing defective PCM, remove knock sensor module or PROM from defective PCM. New PCM does not come equipped with knock sensor module or PROM (if applicable). Install knock sensor module or PROM into new PCM.

Removal

Ensure ignition switch is in OFF position. Disconnect negative battery cable. Remove electrical connectors from PCM. Remove PCM from vehicle. Remove access cover and remove knock sensor module or PROM (if applicable) from PCM.

Installation

Install knock sensor module or PROM (if applicable) in new PCM. Install access cover. Install PCM into vehicle. Connect electrical connectors to PCM. Reconnect negative battery cable to battery.

Disconnect negative battery cable. Remove PCM from vehicle. See POWERTRAIN CONTROL MODULE (PCM) . Position PCM so access cover faces upward. Remove access cover from PCM. Using thumb and forefinger, squeeze both ends of PROM inward (outward on some models) and pull PROM up from access hole.

Note. Note reference notch locations in PROM and PCM for reassembly reference.

1. Ensure new PROM has same service number as old one. Position PROM squarely over PCM PROM access hole. Press on outer edges of PROM until PROM is firmly seated in PCM. NOTE: Ensure reference notches in both PCM and PROM are properly aligned. If PROM is installed backward, PROM will be destroyed when ignition is turned on.
2. Install PROM access cover on PCM. Install PCM in vehicle. See «POWERTRAIN CONTROL MODULE (PCM)»(/chevrolet/camaro/iv-1992-1998/remont/removal-installation/#engine-controls-removeinstalloverhaul-34l57l__powertrain-control-module-pcm) . Start engine and enter diagnostics. See appropriate TESTS W/CODES article in this section below. Check for diagnostic trouble codes. See appropriate TESTS W/CODES article in this section for code identification. «TESTS W/CODES - 3.4L»(/chevrolet/camaro/iv-1992-1998/remont/testing-diagnostics/#engine-controls-tests-wcodes-34l) «TESTS W/CODES - 5.7L»(/chevrolet/camaro/iv-1992-1998/remont/testing-diagnostics/#engine-controls-tests-wcodes-57l)
3. If code(s) sets, PROM is either not fully seated in PCM or installed backward, has bent pins or is defective. If bent pins crack when trying to straighten, replace PROM. If PROM is installed backward or is defective, replace PROM.

Removal & Installation

1. Disconnect negative battery cable. Remove PCM from vehicle. See «POWERTRAIN CONTROL MODULE (PCM)»(/chevrolet/camaro/iv-1992-1998/remont/removal-installation/#engine-controls-removeinstalloverhaul-34l57l__powertrain-control-module-pcm) . Position PCM so access cover faces upward. Remove access cover from PCM.
2. Using thumb and forefinger, squeeze both ends of knock sensor module inward and pull module up from access hole. To install, reverse removal procedure. Ensure module latches into holder in PCM.

Removal & Installation (3.4L)

1. Disconnect negative battery cable. Disconnect connectors at ignition control module. (Scheme 2) Disconnect spark plug wires from coil pack. Remove coil pack/ignition control module assembly. For ignition control module location, see COMPONENT LOCATIONS in «SYSTEM/COMPONENT TESTS - 3.4L»(/chevrolet/camaro/iv-1992-1998/remont/testing-diagnostics/#engine-controls-systemcomponent-tests-34l) article in this section below. Separate ignition coil(s) from ignition control module (if possible).
2. To install, reverse removal procedure. Tighten ignition control module mounting bolts/nuts. Tighten mounting bolts/nuts to specification. See «TORQUE SPECIFICATIONS»(/chevrolet/camaro/iv-1992-1998/remont/removal-installation/#engine-controls-removeinstalloverhaul-34l57l).

Scheme 2

Disconnect negative battery cable. Remove throttle cable shield and bracket from throttle body. Disconnect sensor harness connector. Remove camshaft position sensor bolt and remove sensor. To install, reverse removal procedure. Tighten sensor bolt to specification. See TORQUE SPECIFICATIONS .

1. Disconnect negative battery cable. Turn steering wheel to left, and raise and support vehicle (if necessary). Remove starter motor (if necessary). Remove intermediate exhaust pipe, and rack and pinion heat shield (if necessary). Remove generator cooling duct sensor (if necessary).
2. Disconnect sensor harness connector. Remove sensor mounting bolt. Remove sensor from engine block. Inspect sensor "O" ring for wear, cracks or other damage. Replace as necessary. Lubricate NEW "O" ring with engine oil before installing. To install, reverse removal procedure. Tighten sensor bolt to specification. See «TORQUE SPECIFICATIONS»(/chevrolet/camaro/iv-1992-1998/remont/removal-installation/#engine-controls-removeinstalloverhaul-34l57l) .

1. Disconnect negative battery cable. Remove serpentine belt from crankshaft pulley. Raise and support vehicle.
2. Remove crankshaft harmonic balancer bolt. Using Balancer Remover (J-38197), remove harmonic balancer. Disconnect sensor harness connector. Remove sensor bolts. Remove sensor.
3. To install, reverse removal procedure. Apply Thread Sealer (GM 1052080) to threads of harmonic balancer bolt. Tighten sensor and harmonic balancer bolts to specification. See «TORQUE SPECIFICATIONS»(/chevrolet/camaro/iv-1992-1998/remont/removal-installation/#engine-controls-removeinstalloverhaul-34l57l) .

Removal & Installation (DIS - 3.4L)

Disconnect negative battery cable. Remove spark plug wires from coils. Remove nuts or screws attaching ignition coils to ignition control module. Remove coils. To install, reverse removal procedure.

Removal (5.7L)

Note. For component identification in removal and installation procedure. Refer to illustration. (Scheme 3)and (Scheme 4).

1. Ensure ignition switch is in "OFF" or "LOCK" position.
2. Remove four-terminal PCM connector at ignition coil module.
3. Remove ignition coil wiring connectors and ignition coil harness.
4. Remove bolt/screw and stud (6).
5. Remove ignition coil assembly (8). DO NOT wipe silicone grease from bottom of ignition coil assembly if it is to be reinstalled.

Scheme 3

Scheme 4

1. Spread silicone grease on metal mounting face of ignition coil bracket if necessary, and position ignition coil assembly (8) to cylinder head.
2. Install stud (6). Tighten to 18 ft. lbs. (25 Nm).
3. Install bolt/screw. Tighten to 18 ft. lbs. (25 Nm).
4. Connect ignition coil harness, ignition coil wiring connectors and four-terminal PCM connector to ignition coil module.

OPTI-SPARK DISTRIBUTOR ASSEMBLY (5.7L)

Note. For components identified in ventilation system checking. Refer to illustration. (Scheme 5) Do not allow foreign material to enter open vacuum lines or cap ends.

Distributor Assembly Ventilation System Checking

The ventilation system vacuum harness assembly (29), connected to the air intake duct (30), the distributor assembly (1) and the air intake manifold (31), provides ventilation to the distributor assembly (1), thus preventing moisture build-up and possible ignition system failure. A check valve at the air intake duct connection insures one-way flow through the distributor assembly (1) to the air intake manifold (31). (Scheme 4)for correct orientation.

The ventilation system vacuum harness assembly (29) connects to the air intake duct (30) and the air intake manifold (31) with vacuum fittings. It attaches to the distributor assembly (1) at two places with separately sized connectors.

In the case of ignition system failure, check vacuum harness assembly (29) for proper hook-up and/or kinks. If okay, check the ventilation system for a possible restriction before removing the distributor assembly (1).

Disconnect the vacuum harness assembly (29) at the air intake duct (30) and check for vacuum using a vacuum gauge. The gauge needle should slowly move towards manifold vacuum. If no vacuum is present, replace the vacuum harness assembly (29). Once is has been determined that the ventilation system vacuum harness assembly is functioning properly, disconnect the vacuum gauge and reconnect the vacuum hose to the air intake duct. Running the engine with manifold vacuum present in the distributor may lead to engine misfire.

Scheme 5

Note. For component identification in removal procedure. Refer to illustration. (Scheme 6) Do not allow foreign material to enter open vacuum lines or cap ends.

1. Check distributor assembly ventilation system for proper operation. See «DISTRIBUTOR ASSEMBLY VENTILATION SYSTEM CHECKING»(/chevrolet/camaro/iv-1992-1998/remont/removal-installation/#engine-controls-removeinstalloverhaul-34l57l__distributor-assembly-ventilation-system-checking).
2. Disconnect negative battery cable. Drain cooling system. Disconnect Intake Air Temperature (IAT) sensor harness connector. Remove air intake duct. Remove serpentine belt. Remove coolant hoses to water pump assembly. Disconnect coolant temperature sensor harness connector.
3. Remove water pump assembly. See «WATER PUMP»(/chevrolet/camaro/iv-1992-1998/remont/mechanical/#engine-mechanical-57l-v8-vin-p__water-pump) under REMOVAL & INSTALLATION in ENGINE article.
4. Remove crankshaft balancer assembly. See «CRANKSHAFT BALANCER PULLEY ASSEMBLY & HUB»(/chevrolet/camaro/iv-1992-1998/remont/mechanical/#engine-mechanical-57l-v8-vin-p__crankshaft-balancer-pulley-assembly-hub) under REMOVAL & INSTALLATION in ENGINE article.
5. Remove serpentine belt tensioner.
6. Remove spark plug wire harness assemblies from distributor assembly (1). See «SPARK PLUG WIRE HARNESS ASSEMBLY (OPTI-SPARK)»(/chevrolet/camaro/iv-1992-1998/remont/removal-installation/#engine-controls-removeinstalloverhaul-34l57l__opti-spark-plug-wire-harness-assembly-57l).
7. Disconnect four-terminal PCM connector from distributor assembly. Disconnect vacuum harness assembly (29) from distributor assembly (1). (Scheme 5) Remove distributor bolts/screws (3). Distributor assembly (1). Pull distributor assembly forward until driveshaft disengages from end of camshaft assembly. Mark top surface of distributor shaft for reassembly purposes.
8. Remove distributor bolts/screws. When removing distributor assembly, pull distributor assembly forward until driveshaft disengages from end of camshaft assembly. (Scheme 6) Mark top surface of distributor shaft for reassembly purposes.

Scheme 6

Note. For component identification in installation procedure. Refer to illustration. (Scheme 7) Do not allow foreign material to enter open vacuum lines or cap ends.

1. To install, ensure mark made on distributor shaft during removal is on top or facing up. Install distributor assembly (1) into position with drive shaft (4) in end of camshaft assembly. (Scheme 6) Rotate distributor coupling until camshaft sprocket pin slot aligns with camshaft sprocket pin. Slide distributor (1) onto end of camshaft until fully seated on engine front cover. NOTE: Do not attempt to fully seat distributor (1) using bolts/screws (3). (Scheme 6) If distributor (1) will not seat by hand, it is not properly aligned with camshaft. Optional procedure is to rotate crankshaft until engine is at number 1 cylinder TDC (camshaft sprocket pin at the 9 o'clock position). Rotate the distributor coupling (4) until the camshaft sprocket pin slot aligns with the distributor base timing mark. Install distributor (1) using hand pressure to fully seat.
2. Install distributor bolts/screws. Tighten distributor hold-down bolts to 106 INCH lbs. (12 N.m).
3. Install four-terminal PCM connector to distributor assembly (1). Connect vacuum harness (29) to distributor (1). (Scheme 5)
4. Install spark plug wire harness assemblies to distributor assembly (1). (Scheme 5)
5. Install crankshaft balancer assembly. See «CRANKSHAFT BALANCER PULLEY ASSEMBLY & HUB»(/chevrolet/camaro/iv-1992-1998/remont/mechanical/#engine-mechanical-57l-v8-vin-p__crankshaft-balancer-pulley-assembly-hub) under REMOVAL & INSTALLATION in ENGINE article.
6. Install water pump assembly. See «WATER PUMP»(/chevrolet/camaro/iv-1992-1998/remont/mechanical/#engine-mechanical-57l-v8-vin-p__water-pump) under REMOVAL & INSTALLATION in ENGINE article.
7. Fill and bleed cooling system. See «COOLING SYSTEM BLEEDING»(/chevrolet/camaro/iv-1992-1998/remont/mechanical/#engine-mechanical-57l-v8-vin-p__cooling-system-bleeding) under REMOVAL & INSTALLATION in ENGINE article. Check for leaks.

Scheme 7

OPTI-SPARK DISTRIBUTOR CAP, COVER, ROTOR & BASE ASSEMBLY (5.7L)

Note. The distributor and timing disk assembly must be kept clean and free of oil, dirt and engine coolant. Any contamination may lead to engine misfire and distributor assembly damage. Do not disassemble the distributor until all coolant has been cleaned from the distributor and surrounding area.

Note. For component identification in removal and installation procedure. Refer to illustration. (Scheme 7)

1. Drain cooling system. Remove water pump assembly. See «WATER PUMP»(/chevrolet/camaro/iv-1992-1998/remont/mechanical/#engine-mechanical-57l-v8-vin-p__water-pump) under REMOVAL & INSTALLATION in ENGINE article.
2. Remove crankshaft balancer assembly. See «CRANKSHAFT BALANCER PULLEY ASSEMBLY & HUB»(/chevrolet/camaro/iv-1992-1998/remont/mechanical/#engine-mechanical-57l-v8-vin-p__crankshaft-balancer-pulley-assembly-hub) under REMOVAL & INSTALLATION in ENGINE article.
3. Remove spark plug wire harness assemblies from distributor assembly.
4. Remove four-terminal PCM connector from distributor assembly.
5. Remove vacuum harness assembly from distributor assembly
6. Remove distributor cap bolts/screws (29) using ignition distributor cap socket (J 39997) or equivalent. (Scheme 7) Remove distributor cap (30).
7. Remove rotor bolts/screws (31) using using ignition distributor rotor tool (J 39998) or equivalent. (Scheme 7)
8. Remove rotor assembly (32). Distributor cover (33) and shield (34). (Scheme 7)

Inspection

Inspect Distributor base and timing disk for damage, corrosion or plastic particles. If any are present, replace entire distributor assembly.

1. Install shield (34) and distributor cover (33). Install rotor (32). (Scheme 7)
2. Install rotor bolts/screws (31) using (J 39998) or equivalent. Tighten rotor bolts/screws to 6 INCH lbs. (0.7 N.m).
3. Install distributor cap (30). Distributor cap bolts/screws (29) using ignition distributor cap socket (J 39997) or equivalent. Tighten distributor cap bolts/screws (29) to 25 INCH lbs. (2.8 N.m).
4. Install vacuum harness assembly to distributor assembly. Connect four-terminal PCM connector to distributor. Spark plug wire harness assemblies to distributor assembly.
5. Install water pump assembly. See «WATER PUMP»(/chevrolet/camaro/iv-1992-1998/remont/mechanical/#engine-mechanical-57l-v8-vin-p__water-pump) under REMOVAL & INSTALLATION in ENGINE article.
6. Install crankshaft balancer assembly. See «CRANKSHAFT BALANCER PULLEY ASSEMBLY & HUB»(/chevrolet/camaro/iv-1992-1998/remont/mechanical/#engine-mechanical-57l-v8-vin-p__crankshaft-balancer-pulley-assembly-hub) under REMOVAL & INSTALLATION in ENGINE article.

OPTI-SPARK PLUG WIRE HARNESS ASSEMBLY (5.7L)

Note. The boots should be twisted one-half turn while removing. Do not pull on the wires to remove them from the spark plugs. Pull on the boots, or use a tool designed for this purpose. When replacing spark plug wire harness assemblies (secondary wiring), route the wires correctly and through the proper retainers. Failure to route the wires properly can lead to radio ignition noise and crossfiring of the spark plugs, or shorting of the leads to ground.

1. Ensure ignition switch is in "OFF" or "LOCK" position.
2. Raise and suitably support vehicle. Remove crossover pipe from exhaust manifold assemblies.
3. Remove power steering pump assembly.
4. Drain coolant, remove lower radiator hose from water pump.
5. Remove spark plug wire harness from wire harness clips. Remove spark plug wire harness from distributor, and remove spark plug wire harness from spark plugs. (Scheme 8)

Scheme 8

1. Connect spark plug wire harness to spark plugs. Spark plug wire harness to distributor, and spark plug wire harness to wire harness clips.
2. Install lower radiator hose to water pump.
3. Install crossover pipe to exhaust manifold assemblies. Tighten crossover pipe to exhaust manifold nuts to 26 ft. lbs. (35 N.m).
4. Install power steering pump assembly, lower vehicle.
5. Fill and bleed cooling system. See «COOLING SYSTEM BLEEDING»(/chevrolet/camaro/iv-1992-1998/remont/mechanical/#engine-mechanical-57l-v8-vin-p__cooling-system-bleeding) under REMOVAL & INSTALLATION in ENGINE article. Check for leaks.

FUEL PRESSURE RELIEF

1. Fuel system is under pressure. Relieve pressure before servicing fuel system. Fuel pressure may be relieved using one of 2 different methods.
2. One method is to disconnect fuel pump connector. Start engine and allow to run until it stops. Operate starter for 3 seconds to remove remaining fuel from fuel lines. Reconnect fuel pump once repair is complete.
3. The other method is to install Fuel Pressure Gauge (J-34730-1) on fuel pressure test port. When installing fuel pressure gauge, wrap shop towel around pressure connection to absorb fuel leakage. Place gauge bleed hose in container. Open bleed valve to bleed fuel pressure.

THROTTLE BODY

Note. Ensure residual fuel pressure is relieved before working on throttle body.

1. Relieve fuel pressure. See «FUEL PRESSURE RELIEF»(/chevrolet/camaro/iv-1992-1998/remont/removal-installation/#engine-controls-removeinstalloverhaul-34l57l__fuel-pressure-relief) . Disconnect negative battery cable. Remove air intake ducts. Disconnect and mark electrical connections and vacuum hoses from throttle body. Disconnect control cables from throttle body.
2. Drain cooling system and remove coolant hoses to throttle body (if applicable). Remove throttle body retaining bolts. Remove throttle body and gasket.

Note. Identification number is stamped on throttle body. Use identification number to order replacement components.

1. To install, reverse removal procedure using NEW gasket. Tighten retaining bolts to specification. See «TORQUE SPECIFICATIONS»(/chevrolet/camaro/iv-1992-1998/remont/removal-installation/#engine-controls-removeinstalloverhaul-34l57l) . Refill cooling system (if drained).
2. If installing new Idle Air Control (IAC) valve, ensure IAC pintle length setting is adjusted before installation. See IDLE AIR CONTROL (IAC) VALVE. Adjust idle speed and TP sensor (if removed, and if adjustable). See «ADJUSTMENTS»(/chevrolet/camaro/iv-1992-1998/remont/adjustments/#engine-controls-adjustments) article in this section.

FUEL PRESSURE REGULATOR

Note. On 3.4L, fuel pressure regulator and fuel rail are serviced as an assembly only. DO NOT remove pressure regulator or pressure regulator cover from fuel rail.

1. Relieve fuel pressure. See «FUEL PRESSURE RELIEF»(/chevrolet/camaro/iv-1992-1998/remont/removal-installation/#engine-controls-removeinstalloverhaul-34l57l__fuel-pressure-relief) . Disconnect negative battery cable. Remove resonator and resonator bracket. Disconnect pressure regulator vacuum hose. Remove fuel return line bracket and retainer clip. Remove fuel return line and "O" ring from pressure regulator. Remove fuel rail. See «FUEL RAIL & INJECTORS»(/chevrolet/camaro/iv-1992-1998/remont/removal-installation/#engine-controls-removeinstalloverhaul-34l57l__fuel-rail-injectors) .
2. Remove pressure regulator screws. Remove pressure regulator from fuel rail. Remove pressure regulator retainer and spacer assembly from fuel rail. Remove fuel inlet "O" ring from pressure regulator. Remove and discard filter screen if dirty.

To install, reverse removal procedure. DO NOT reuse "O" rings. Lubricate fuel inlet "O" ring with oil and install in regulator. Replace filter screen as necessary. Tighten screws to specification. See TORQUE SPECIFICATIONS .

FUEL RAIL & INJECTORS

Note. If injector is replaced, ensure replacement injector has the same part number as injector removed.

Removal (3.4L)

1. Relieve fuel pressure. See «FUEL PRESSURE RELIEF»(/chevrolet/camaro/iv-1992-1998/remont/removal-installation/#engine-controls-removeinstalloverhaul-34l57l__fuel-pressure-relief). Disconnect negative battery cable. Remove air intake duct (if necessary).
2. Disconnect vacuum hose at fuel pressure regulator. Disconnect and plug fuel return line at pressure regulator. Disconnect and plug fuel inlet line at fuel rail. Disconnect electrical connectors from injectors.
3. Remove fuel rail retaining bolts. Remove fuel rail from intake manifold using equal force on both sides of fuel rail. (Scheme 9) Remove injector-to-fuel rail retaining clip (if equipped). Remove injectors from fuel rail. Remove injector "O" rings and discard.

To install, reverse removal procedure. Coat NEW injector "O" rings with clean engine oil. Install injector-to-fuel rail retaining clip with open end facing injector electrical connection. Position fuel rail on intake manifold. Push down on rail to seat injectors in manifold. Tighten fuel rail retaining bolts. See TORQUE SPECIFICATIONS . To complete installation, reverse removal procedure.

1. Relieve fuel pressure. See «FUEL PRESSURE RELIEF»(/chevrolet/camaro/iv-1992-1998/remont/removal-installation/#engine-controls-removeinstalloverhaul-34l57l__fuel-pressure-relief). Disconnect negative battery cable. Remove resonator and resonator bracket.
2. Disconnect quick-connect fitting at fuel rail inlet and return lines. Disconnect vacuum hose at pressure regulator. Remove any vacuum lines as necessary to gain access to fuel rail and fuel lines. Remove electrical harness from routing clips on fuel rail.
3. Remove fuel line retaining bolt. Disconnect electrical connectors from injectors. Remove fuel rail retaining bolts. Remove fuel rail from intake manifold using equal force on both sides of fuel rail. (Scheme 9) Remove injector-to-fuel rail retaining clip. Remove injector from fuel rail. Remove injector "O" rings and discard.

To install, reverse removal procedure. Lubricate NEW injector "O" rings with clean engine oil. Install injector-to-fuel rail retaining clip on right side of injector electrical connection. Position fuel rail on intake manifold. Push down on rail to seat injectors in manifold. Tighten fuel rail retaining bolts. See TORQUE SPECIFICATIONS . To complete installation, reverse removal procedure.

Locating Fuel Rail Assembly Components (3.4L). Scheme 9

Locating Fuel Rail Assembly Components (5.7L). Scheme 10

IDLE AIR CONTROL (IAC) VALVE

Remove electrical connector from IAC valve. Remove IAC valve, gasket and "O" ring from throttle body assembly.

1. Inspect gasket or "O" ring for damage. Replace as necessary. Check the extended distance of IAC pintle before installing. Damage will occur if measurement is incorrect. Distance must not exceed 1 1/8" (28 mm). Measurement should be taken from valve housing flange to end of pintle cone.
2. To retract NEW IAC valve pintle, slowly exert finger pressure on valve. Install NEW "O" ring or gasket on valve. Coat "O" ring with clean engine oil. Install IAC valve. Tighten IAC valve to specification. See «TORQUE SPECIFICATIONS»(/chevrolet/camaro/iv-1992-1998/remont/removal-installation/#engine-controls-removeinstalloverhaul-34l57l) . Install electrical connector. To reset IAC valve, refer to «ADJUSTMENTS»(/chevrolet/camaro/iv-1992-1998/remont/adjustments/#engine-controls-adjustments) article in this section.

IN-LINE FUEL FILTER

1. Remove negative battery cable.
2. Relieve fuel system pressure. Refer to «FUEL PRESSURE RELIEF»(/chevrolet/camaro/iv-1992-1998/remont/removal-installation/#engine-controls-removeinstalloverhaul-34l57l__fuel-pressure-relief) .
3. Raise vehicle.
4. Clean all in-line fuel filter connections and surrounding areas before disconnecting to avoid possible contamination of the fuel system.
5. Remove quick-connect fitting at fuel filter inlet.
6. Remove threaded fitting from fuel filter outlet.
7. Slide fuel filter from bracket.
8. Inspect fuel pipe O-ring for cuts, nicks, swelling or distortion. Replace as necessary.

1. Slide fuel filter into bracket.
2. Install threaded fitting to fuel filter outlet. Tighten in-line fuel filter fitting to 22 Ft. lbs. (30 N.m).
3. Install quick-connect fitting to fuel filter inlet.
4. Lower vehicle.
5. Tighten fuel filter cap.
6. Install negative battery cable.
7. Turn ignition ON for 2 seconds and then OFF for 10 seconds. Turn ON and check for fuel leaks.

1. Relieve fuel system pressure. See «FUEL PRESSURE RELIEF»(/chevrolet/camaro/iv-1992-1998/remont/removal-installation/#engine-controls-removeinstalloverhaul-34l57l__fuel-pressure-relief) . Disconnect battery negative terminal. Raise car on hoist. Drain fuel from fuel tank. Disconnect exhaust pipe at converter and rear hanger. Allow exhaust to hang over axle assembly.
2. Remove tailpipe and muffler heat shields. Remove fuel filler neck shield behind left rear tire. Remove rear suspension track bar and brace. Disconnect harness connector to fuel pump assembly.
3. Disconnect all fuel lines. Remove fuel line retaining bracket on left side and remove brake line clip from bracket.
4. Position support jack under axle assembly. Disconnect lower ends of shock absorbers. Disconnect rear stabilizer bar from frame (if equipped).
5. On models equipped with 2-piece driveshaft, remove center support bearing-to-rear axle torque arm bolts. On all models, remove rear axle torque arm-to-differential housing bolts/nuts. Wire end of rear axle torque arm aside. Remove driveshaft-to-differential yoke bolts/screws. Wire end of driveshaft aside.
6. Lower rear suspension as far as possible without damaging brake lines and cables and remove both coil springs. Remove tank straps bolts. Remove fuel tank by rotating front of tank down and sliding to the right. Remove fuel pump assembly from fuel tank.
7. To install, reverse removal procedure using new "O" ring/gasket. Tighten fasteners to specification. See «TORQUE SPECIFICATIONS»(/chevrolet/camaro/iv-1992-1998/remont/removal-installation/#engine-controls-removeinstalloverhaul-34l57l__torque-specifications) .

Turn ignition switch to OFF position. Disconnect electrical connector from TP sensor. Remove TP sensor retaining screws. Remove TP sensor from throttle body.

1. With throttle valve in closed position, install TP sensor on throttle body. Ensure TP sensor lever engages with drive lever on throttle shaft. Install retaining screws and electrical connection.
2. TP sensor is self-zeroing and is not adjustable. See «ADJUSTMENTS»(/chevrolet/camaro/iv-1992-1998/remont/adjustments/#engine-controls-adjustments) article in this section.

OXYGEN SENSOR

Oxygen sensor is mounted in exhaust pipe, below exhaust manifold. It is equipped with a permanent pigtail which must remain intact when removing sensor.

1. Ensure sensor is free of contaminants. DO NOT use cleaning solvents of any type. Sensor may be difficult to remove when engine temperature is less than 120°F (48°C). Excessive removal force may damage threads in exhaust manifold or pipe.
2. Disconnect negative battery cable. Disconnect electrical connector from oxygen sensor. Carefully remove oxygen sensor from exhaust pipe.

1. Whenever an oxygen sensor is removed, coat threads with anti-seize compound before it is reinstalled. New oxygen sensors already have this compound applied to threads.
2. Install oxygen sensor in exhaust pipe. Tighten sensor to 30 ft. lbs. (41 N.m). Reconnect electrical connector to oxygen sensor. Reconnect negative battery cable.

TORQUE SPECIFICATIONS

TORQUE SPECIFICATIONS

See also:
• COMPUTER RELEARN PROCEDURES
• TESTS W/CODES - 3.4L
• TESTS W/CODES - 5.7L
• SYSTEM/COMPONENT TESTS - 3.4L
• WATER PUMP
• CRANKSHAFT BALANCER PULLEY ASSEMBLY & HUB
• COOLING SYSTEM BLEEDING
• ADJUSTMENTS
• POWERTRAIN CONTROL MODULE (PCM)
• TORQUE SPECIFICATIONS
• DISTRIBUTOR ASSEMBLY VENTILATION SYSTEM CHECKING
• SPARK PLUG WIRE HARNESS ASSEMBLY (OPTI-SPARK)
• FUEL PRESSURE RELIEF
• FUEL RAIL & INJECTORS
• TORQUE SPECIFICATIONS