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Home >> Volvo >> 2004 >> XC90 Base, AWD >> Repair and Diagnosis >> Engine Performance >> Fuel Delivery >> Fuel System - Cleaning, Inspection And Adjustment >> Control System (B5254T2; 2003-2007) >> Fuel System Pressure, Checking

Fuel System Pressure, Checking

Special tools 
GLL108402
T9995011 MANOMETER (FUEL PRESSURE) CI, LH, LE 
Tool number:  T9995011
Tool description:  MANOMETER (FUEL PRESSURE) CI, LH, LE
Tool boards: 
GLL108402
T9989725 ADAPTER(-5011 CONNECTION TANK DRAINING UNIT) 
Tool number:  T9989725
Tool description:  ADAPTER(-5011 CONNECTION TANK DRAINING UNIT)
Tool boards: 
GLL100289
T9995479 ADAPTER (CHECK-FUEL PRESSURE) 
Tool number:  T9995479
Tool description:  ADAPTER (CHECK-FUEL PRESSURE)
Tool boards: 
GLL108398
T9812270 PUMP TROLLEY 
Tool number:  T9812270
Tool description:  PUMP TROLLEY
Tool boards: 
GLL108398
T9812273 PUMP (UNLEADED) 
Tool number:  T9812273
Tool description:  PUMP (UNLEADED)
Tool boards: 
GLL108398
T9812282 TANK(UNLEADED GASOLINE) 
Tool number:  T9812282
Tool description:  TANK(UNLEADED GASOLINE)
Tool boards: 

Check the fuel pressure

Absolute pressure: Fuel pressure in fuel system + air pressure.

Relative pressure: Fuel pressure in fuel system.

The air pressure is approx. 100 kPa at sea level. VIDA measures the fuel pressure in absolute pressure. External pressure gauge (pressure gauge) measures the fuel pressure in relative pressure.

Fuel line pressure. See SPECIFICATIONS, MECHANICAL

The following method must be used when reading the fuel line pressure on the fuel rail:

Fig 1: Fuel Pressure Gauge
GLL100887Courtesy of VOLVO CARS CORPORATION

Engagement of fuel pressure gauge.

Supplement the pressure gauge with adapter and nipple before use.

Connect the adapter to the valve on the fuel rail in the locked position (image 1, valve closed).

Set the cock on the pressure gauge in the direction of the nipple.

see 9995479

Connect the pressure gauge's other connection to the fuel drain equipment.

Unlock the adapter (valve open).

Start the engine.

Read off the relative pressure.

Fig 2: Fuel Pressure Gauge Adapter
GLL100889Courtesy of VOLVO CARS CORPORATION

Disengagement of fuel pressure gauge.

Ignition off.

Start the draining unit.

Set the cock on the pressure gauge to the central position.

Secure the adapter (image 1, valve closed).

Remove the adapter from the valve.

Stop the draining unit.

Reset the equipment.