High Pressure Fuel Pump Inspection

NOTE:

Perform the following inspection only when directed.
The following vacuum values are indicated by relative pressure from the fuel pressure sensor.

Verify that the fuel pressure sensor is normal. (See FUEL PRESSURE SENSOR INSPECTION ).
Connect the M-MDS to the DLC-2.
Turn the ignition switch to the ON position (Engine off).
Select the FUEL_PRES, and LOAD, RPM PIDs on the M-MDS.
CAUTION:
- If the engine is run at a high speed, it could be damaged. When racing the engine, do not race it up to 6,700 rpm or more.
  
  Fig 1: Identifying DLC-2 Connector
  Courtesy of MAZDA MOTORS CORP.
After the LOAD PID is 60% or more while the engine is raced with the accelerator pedal fully depressed, verify that the FUEL_PRES PID is approx.11.5Mpa.
- If not as verified, replace the high pressure fuel pump.