16625-AA010
HITACHI 16625-AA010 Bomba Alta Presión Subaru WRX Forester XT 2.0T FA20F
16625-AA011, HPP0020, GDP502--150 barEspecificaciones técnicas
| Especificación | Valor |
|---|---|
| Part Number / SKU | 16625-AA010 |
| Manufacturer Brand | HITACHI |
| Component Type | Mechanical High Pressure Fuel Pump (HPFP) |
| Engine Application | Subaru 2.0L FA20F DIT Turbocharged Boxer DOHC 16V (FA20 DIT) |
| Presión de servicioDato clave | |
| Mounting Torque (Flange / Bracket) | 25 N-m (18 lb-ft) |
| Fuel Line / Rail Torque | 32 N-m (24 lb-ft) |
| Códigos de avería frecuentes | P0087, P0088, P0171, P2293 |
Bomba de alta presión compatible (Ensamblaje del circuito de combustible)
Funciona en el mismo circuito de alta presión Common Rail. Al diagnosticar baja presión (P0087), verifique el caudal de la bomba antes de sustituir los inyectores.
Consejos de instalación
- Depressurize Fuel System: Pull fuel pump fuse or disconnect LPFP harness. Crank engine 5-8 seconds until it stalls to drop residual rail pressure below 5 bar.
- Clean Surrounding Cavity: Blow compressed air around cylinder head bore or pump flange cavity to prevent dirt ingress into the fuel rail.
- Lubricate & Fit Seals: Inspect Teflon combustion seals or O-rings. Coat lightly with clean motor oil (do not use grease) to avoid tearing during insertion.
- Torque to Factory Specification: Hand-thread bolts evenly. Tighten mounting fasteners to 25 N-m (18 lb-ft), and torque fuel line fittings to 32 N-m (24 lb-ft).
- Prime & Leak Check: Cycle ignition to RUN position 3 times (5 seconds each) to build low-side pressure. Inspect fittings for leaks before starting engine.
Codigos de Falla (DTC) y Protocolos de Diagnostico
Codigos de falla de diagnostico (DTC) comunes que se activan cuando este inyector common rail experimenta desgaste, fallas de circuito o desbalance:
Fuel Rail / System Pressure Too Low
Excessive internal backleak from worn control valve seats drops common rail pressure below target under engine load.
Injector Circuit Malfunction / Open Circuit
Solenoid coil resistance drift (0.2-0.5 Ω) or piezo stack degradation triggers driver stage shutdown on affected cylinders.
Cylinder Misfire & Balancing Deviation
Carbon-clogged nozzle spray holes or missing IMA calibration causes uneven cylinder contribution. Recode ECM and verify washer seating.
Fuel Rail / System Pressure Too High
Spill line backpressure or stuck metering valve prevents rail depressurization, creating overpressure risks under load.
Protocolos Técnicos de Diagnóstico y Servicio
Procedimientos de taller verificados, umbrales de prueba y pautas de servicio para este conjunto.