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Fuel Injector Leakage

WARNING: This page is about a different car, the 2003 Mazda Protege5, 2003 Mazda Protege, 2003 Mazda MX-5 Miata, 2003 Mazda MPV, and 2003 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
  1. Using mechanics wire, secure each fuel injector to fuel rail. Disconnect fuel injector connectors. Remove fuel rail assembly from intake manifold. See REMOVAL, OVERHAUL & INSTALLATION article. Reconnect fuel lines to fuel rail. Locate underhood DLC-1 in left side of engine compartment.
  2. Connect a fused jumper wire between underhood DLC-1 terminals "F/P" and GND. See Fig 1. Turn ignition on. Tilt injectors about 60 degrees and check fuel injector nozzles for fuel leaks. Fuel leakage should be less than one drop every 2 minutes. If excessive fuel leakage is present, replace faulty fuel injector.
Fig 1: Identifying DLC-1 Terminals
G97I06647Courtesy of MAZDA MOTORS CORP.
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