Fuel Pressure Test: Test

How to use this manual .

WARNING:  

Flammable - Keep Fire Away

NOTICE:  

Refer to the Fuel and Emissions Systems Service Precautions  before doing the procedure.

NOTE: 

• If you were referred to this procedure from a troubleshooting procedure, test the fuel pressure under the same conditions the malfunction occurred (engine speed, load, throttle position, etc.).
• If the pump does not run, check for DTCs , then do the appropriate DTC troubleshooting procedure.

1. Fuel Pressure - Test

   Preconditions 

   • Fuel Pressure Relieved - Refer to: Fuel Pressure Relieving ()  or Fuel Pressure Test () 
   • 12 Volt Battery Terminal Disconnected

   Figure 1 

   Courtesy of HONDA, U.S.A., INC.

   Procedure/Specifications 

   1. Disconnect the quick-connect fitting (a) . (Figure 1)

   NOTE:

   Place a rag or shop towel (b) over the quick-connect fitting.

   Figure 2 

   Courtesy of HONDA, U.S.A., INC.

   2. Attach the gauge, fuel pr. 100 psi and the fuel pressure gauge attachment set. Check for leaks with the gauge set attached. (Figure 2)

   3. Start the engine, and let it idle.

   4. Read the fuel pressure gauge.

   Specifications 

   Condition	Specification
   At Idle Speed	410-460 kPa (4.18-4.69 kgf/cm 2  , 59.5-66.7 psi)

   Result 

   • If the fuel pressure is beyond the specified value, replace the fuel pressure regulator (part of the fuel tank unit) .
   • If the fuel pressure is below the specified value, the cause may be one of the following:
     • Fuel leak
     • Fuel Tank Unit/Fuel Filter Components Parts

   	Abnormal fuel pressure regulator (part of the fuel tank unit)
   	Plugged fuel filter (part of the fuel tank unit)
   	Abnormal fuel pump (part of the fuel tank unit)