PY8W-13-250
DENSO PY8W-13-250 Iniettore Alta Pressione Mazda CX-9 CX-5 2.5L SkyActiv-G
PY01-13-250A, 297500-1120High-Speed Solenoid Actuated Multi-Hole Nozzle-200 barSpecifiche Tecniche
| Specifica | Valore |
|---|---|
| Tipo di sistema | Denso Multi-Hole Direct Gasoline Fuel Injector |
| Pressione di esercizioSpecifica Chiave | |
| Spray Pattern | Multi-hole asymmetrical fan pattern optimized for high compression ratio |
| Fuel Rail Bolt Torque | 10 N·m (holding bracket flanged fasteners) |
| High Pressure Pipe Torque | 25 N·m Flare Nut Connection |
| Coil Resistance | 1.8 - 2.2 Ω at 20°C (High performance peak-and-hold drive) |
| Codici guasto tipici | P0300 (Random Misfire), P0301-P0304 (Cylinder Misfire), P0171 (System Too Lean Bank 1) |
| Workshop Precaution | Replace Teflon combustion chamber seal ring and sizing collar prior to cylinder head installation |
Pompa alta pressione abbinata (Gruppo circuito carburante)
Funziona sullo stesso circuito ad alta pressione Common Rail. In caso di bassa pressione rail (P0087), verificare la portata della pompa prima di sostituire gli iniettori.
Istruzioni di montaggio
- [
- {
- "step": 1,
- "title": "Depressurize Fuel Rail & Remove Intercooler Charge Piping",
- "instruction": "Depressurize fuel injection system via fuel pump fuse pull. Remove top-mount intercooler and intake charge tubes to access the center fuel rail."
- },
- {
- "step": 2,
- "title": "Disconnect Direct Injector Harness & Fuel Rail Lines",
- "instruction": "Unplug injector electrical connectors. Disconnect high pressure steel fuel rail line (25 N·m) and unbolt fuel rail mounting bolts (10 N·m)."
- },
- {
- "step": 3,
- "title": "Extract Injectors & Fit New Teflon Chamber Seals",
- "instruction": "Carefully remove injectors with puller tool. Fit new Teflon chamber seals using the installation mandrel and compression die."
- },
- {
- "step": 4,
- "title": "Torque Rail Fasteners & Verify Pressure Integrity",
- "instruction": "Press injectors into cylinder head. Tighten rail bolts to 10 N·m. Torque steel high pressure line to 25 N·m. Start engine and verify zero fuel leakage."
- }
- ]
Codici Guasto (DTC) e Protocolli Diagnostici
Codici guasto diagnostici (DTC) comuni generati quando questo iniettore common rail presenta usura, problemi ai circuiti o scostamenti:
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.
Protocolli Tecnici di Diagnosi & Assistenza
Procedure d'officina verificate, valori soglia di test e linee guida operative per questo assieme.