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3-78 FUEL SYSTEM (DFI)
Fuel Line
Fuel Pressure Inspection
NOTE
○
Be sure the battery is fully charged.
•
Be sure to place a piece of cloth under the fuel supply
hose [A] of the fuel delivery pipe.
WARNING
Be prepared for fuel spillage; any spilled fuel must
be completely wiped up immediately.
When the fuel hose is disconnected, fuel spills out
from the hose and the pipe because of residual
pressure. Cover the hose connection with a piece
of clean cloth to prevent fuel spillage.
•
Loosen the clamp bolt [B] and pull out the fuel supply
hose.
•
For JT1500-A2 model ∼; Loosen the double spring clamp
[B] with pliers and pull out the fuel supply hose.
•
Quickly install the fuel pressure gauge adapter [A] be-
tween the fuel supply pipe and the fuel supply hose.
•
Connect the pressure gauge [B] to the fuel pressure
gauge adapter.
Special Tools - Fuel Pressure Gauge Adapter: 57001-1463
Oil Pressure Gauge, 5 kgf/cm²: 57001-125
WARNING
Do not try to start the engine with the fuel hoses
disconnected.
•
Start the engine, and let it idle.
•
Measure the fuel pressure with the engine idling.
Fuel Pressure (idling)
Standard: approx. 294 kPa (3.0 kgf/cm², 43 psi)
NOTE
○
The gauge needle will fluctuate. Read the pressure at
the average of the maximum and minimum indications.
If the fuel pressure is much higher than the specified,
check the following:
Fuel Hose from Gauge Adapter to Fuel Pump Return
Pipe for Sharp Bend, Kinking, or Clogging
Fuel Pump
If the fuel pressure is much lower than specified, check
the following:
Fuel Line Leakage
Fuel Injectors
Fuel Pump
Amount of Fuel Flow (see Fuel Flow Rate Inspection)