FUEL SYSTEM (PGM-FI)
6-3
SERVICE INFORMATION
GENERAL
• Work in a well ventilated area. Smoking or allowing flames or sparks in the work area or where gasoline is stored can
cause a fire or explosion.
• Before disconnecting the fuel feed hose, relieve fuel pressure from the system by starting the engine with the fuel pump
connector disconnected (page 6-44).
• Bending or twisting the control cables will impair smooth operation and could cause the cables to stick or bind,
resulting in loss of vehicle control.
• Do not apply commercially available carburetor cleaners to the inside of the throttle bore.
• Do not snap the throttle valve from full open to full close after the throttle cable has been removed. It may cause
incorrect idle operation.
• Seal the intake manifold ports with tape or a clean cloth to keep dirt and debris from entering the engine after the
throttle body has been removed.
• Do not damage the throttle body. It may cause incorrect throttle valve operation.
• Prevent dirt and debris from entering the throttle bore and air passages after the throttle body has been removed. Clean
them using compressed air if necessary.
• The throttle body is factory pre-set. Do not disassemble in a way other than shown in this manual.
• Do not loosen or tighten the white painted nut of the throttle body. Loosening or tightening it can cause incorrect throt-
tle valve operation.
• Always replace the packing when the fuel pump is removed.
• A faulty PGM-FI system is often related to poorly connected or corroded connectors. Check those connections before
proceeding.
• When disassembling the fuel system parts, note the location of the O-rings. Replace them with new ones upon
reassembly.
• Use a digital tester for PGM-FI system inspection.
• Refer to the fuel level sensor inspection (page 22-13).
SPECIFICATIONS
TORQUE VALUES
ITEM SPECIFICATIONS
Throttle body identification number GQB4A
Engine idle speed 1,500 ± 100 min
-1
(rpm)
Throttle grip free play 2 – 6 mm (0.1 – 0.2 in)
Fuel injector resistance (at 20°C /68°F) 11 – 13 Ω
PAIR control solenoid valve resistance (at 20°C/68°F) 20 – 24 Ω
Fuel pressure at idle 294 kPa (3.0 kgf/cm
2
, 43 psi)
Fuel pump flow (at 12 V) 33.3 cm
3
(1.1 US oz, 1.2 lmp oz) minimum/10 seconds
Throttle body insulator band screw 5 N·m (0.5 kgf·m, 3.7 lbf·ft)
IACV set plate torx screw 2.1 N·m (0.2 kgf·m, 1.5 lbf·ft)
Sensor unit mounting torx screw 3.4 N·m (0.3 kgf·m, 2.5 lbf·ft)
Throttle body cable bracket screw 3.4 N·m (0.3 kgf·m, 2.5 lbf·ft)
Throttle body wire clamp plate
screw
3.4 N·m (0.3 kgf·m, 2.5 lbf·ft)
ECT sensor 25 N·m (2.5 kgf·m, 18 lbf·ft)
O2 sensor 25 N·m (2.5 kgf·m, 18 lbf·ft)
Fuel pump setting plate nut 12 N·m (1.2 kgf·m, 9 lbf·ft) See page 6-50
Fuel tank mounting washer bolt 12 N·m (1.2 kgf·m, 9 lbf·ft)
Air cleaner housing mounting
washer bolt
11 N ·m (1.1 kgf·m, 8 lbf·ft)
Bank angle sensor mounting screw 1.2 N·m (0.1 kgf·m, 0.9 lbf·ft)
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