Service Information - Honda TRX680FA Service Manual

FUEL SYSTEM (PGM-FI)
SERVICE INFORMATION
GENERAL
• This FUEL SYSTEM section covers service of the electrical and mechanical system of the PGM-FI system, fuel supply
system and air cleaner.
• Before disconnecting the fuel feed hose, relieve pressure from the system by disconnecting the quick connect fitting in
the sub fuel tank (page 6-32).
• Bending or twisting the control cable will impair smooth operation and could cause the cable to stick or bend, resulting
in loss of vehicle control.
• 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.
• Do not snap the throttle valve from full open to full close after the throttle cable has been removed. It may cause incor-
rect idle operation.
• Seal the cylinder head intake port with tape or a clean cloth to keep dirt and debris from entering the intake port 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, IACV, sensor hole and fuel feed hose, clean them using com-
pressed air.
• 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 bolts, nuts and screws of the throttle body. Loosening or tightening them can
cause throttle body malfunction.
• Tighten the yellow painted bolts of the throttle body to the specified torque.
• A faulty PGM-FI system is often related to poorly connected or corroded connectors. Check those connections before
proceeding.
• When disassembling the PGM-FI 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 procedures for fuel level sensor inspection (page 23-10).
SPECIFICATIONS
ITEM
Throttle body identification number
Idle speed
Throttle lever free play
ECT sensor resistance (20°C/68°F)
Fuel injector resistance (at 20°C /68°F)
Fuel pressure
Fuel pump flow (at 12 V)
SPECIFICATIONS
GQ67A
1,400 + 50 rpm (min
1
)
3 - 8 mm (1/8-5/16 in)
2.3-2.6 kQ
11.1- 12.3 Q
284 - 304 kPa (2.9 - 3.1 kgf/cm
2
, 41 - 44 psi)
71 cm
3
(2.4 US oz, 2.5 Imp oz) minimum/10 seconds
TORQUE VALUES
Insulator band screw (throttle body side)
Insulator band screw (cylinder head side)
Throttle drum cover screw
Sensor unit mounting screw
Fuel feed hose bracket screw
Harness guide bracket screw
Fuel injector/feed hose mounting bolt
IACV mounting torx screw
Bank angle sensor mounting bolt
See page 6-42
See page 6-46
1.5 N-m (0.15 kgf-m, 1.1 Ibf-ft)
3.4 N-m (0.35 kgf-m, 2.2 Ibf-ft)
4.2 N-m (0.43 kgf-m, 3.1 Ibf-ft)
4.2 N-m (0.43 kgf-m, 3.1 Ibf-ft)
5.1 N-m (0.53 kgf-m, 3.8 Ibf-ft)
2.1 N-m (0.21 kgf-m, 1.5 Ibf-ft)
1.5 N-m (0.15 kgf-m, 1.1 Ibf-ft)
6-3