Injection Volume Inspection

WARNING: This page is about a different car, the 2004 Mazda RX-8. However, it is still accessible from the selected car via links, so may be relevant.

WARNING:

Fuel line spills and leakage from the pressurized fuel system are dangerous. Fuel can ignite and cause serious injury or death and damage. To prevent this, complete the following inspection with the engine stopped.

Follow the before repair procedure and perform the fuel line safety procedure. (See BEFORE REPAIR PROCEDURE .)

Fig 1: Fixing Fuel Injector To Fuel Distributor With Wire
Courtesy of MAZDA MOTORS CORP.
Disconnect the negative battery cable.
Remove the PCM.
Connect the PCM connector.
Remove the fuel injector and fuel distributor as a single unit. (See FUEL INJECTOR REMOVAL/INSTALLATION .)
Fix the fuel injector to the fuel distributor with a wire or the equivalent.
Connect the appropriate fuel injector connector.
Connect the negative battery cable.
CAUTION:
- Shorting the wrong terminal of the check connector may cause malfunctions. Make sure to short only the specified terminal.
Ground the check connector terminal F/P using the jumper wire.

Fig 2: Connecting Check Connector Terminal F/P To Ground
Courtesy of MAZDA MOTORS CORP.
Turn the ignition switch to the ON position and operate the fuel pump.
CAUTION:
- Shorting the wrong terminal of the PCM may cause malfunctions. Make sure to short only the specified terminal.
Ground the following PCM terminal using the jumper wire, and then measure the injection volume of each fuel injector.

Fig 3: Identifying PCM Wiring Harness Side Connector Terminals
Courtesy of MAZDA MOTORS CORP.
- If not within the specification, replace the fuel injector.
Injection volume

Fig 4: Injection Volume
Courtesy of MAZDA MOTORS CORP.

Fig 5: Fuel Injector & PCM Terminal
Courtesy of MAZDA MOTORS CORP.
Turn the ignition switch to the LOCK position and disconnect the jumper wire.
Inspect all parts by performing the "AFTER REPAIR PROCEDURE". (See AFTER REPAIR PROCEDURE .)