16625-AA010
HITACHI 16625-AA010 Hochdruckpumpe Subaru WRX Forester XT 2.0T FA20F DIT
16625-AA011, HPP0020, GDP502--150 barTechnische Daten
| Spezifikation | Wert |
|---|---|
| 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) |
| BetriebsdruckKernwert | |
| Mounting Torque (Flange / Bracket) | 25 N-m (18 lb-ft) |
| Fuel Line / Rail Torque | 32 N-m (24 lb-ft) |
| Typische Fehlercodes | P0087, P0088, P0171, P2293 |
Passende Hochdruckpumpe (Kraftstoffkreislauf-Baugruppe)
Arbeitet im selben Hochdruck-Common-Rail-Kreislauf. Bei Raildruckabfall (P0087) vor dem Injektortausch die Pumpenförderleistung prüfen.
Einbauhinweise
- 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.
Fehlercodes (DTC) & Diagnoseprotokolle
Häufige Diagnose-Fehlercodes (DTCs), die ausgelöst werden, wenn dieser Common-Rail-Injektor Verschleiß, Schaltkreisfehler oder Kalibrierungsabweichungen aufweist:
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.
Technische Diagnose- & Service-Protokolle
Verifizierte Prüfverfahren, Fehlercode-Grenzwerte und Werkstatt-SOPs für diese Baugruppe.