12698485
GM 12698485 Pompa Wysokiego Ciśnienia Chevrolet Silverado Tahoe GMC Sierra 5.3L
12688609, GDP110, HPP0049--200 barSpecyfikacja techniczna
| Parametr | Wartość |
|---|---|
| Part Number / SKU | 12698485 |
| Manufacturer Brand | GM |
| Component Type | Mechanical High Pressure Fuel Pump (HPFP) |
| Engine Application | General Motors EcoTec3 Gen V 5.3L (L84) & 6.2L (L87) V8 with Dynamic Fuel Management (DFM) |
| Ciśnienie roboczeGłówny parametr | |
| Mounting Torque (Flange / Bracket) | 15 N-m (133 lb-in) |
| Fuel Line / Rail Torque | 30 N-m (22 lb-ft) |
| Typowe kody błędów | P0087, P0088, P0171, P053F |
Dopasowana pompa wysokiego ciśnienia (Układ paliwowy)
Pracuje w tym samym układzie Common Rail wysokiego ciśnienia. Przy spadku ciśnienia (P0087) sprawdź wydatek pompy przed wymianą wtryskiwaczy.
Wskazówki montażowe
- 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 15 N-m (133 lb-in), and torque fuel line fittings to 30 N-m (22 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.
Kody Bledow (DTC) i Protokoly Diagnostyczne
Typowe diagnostyczne kody usterek (DTC) wyzwalane w przypadku zuzycia, awarii obwodu lub rozkalibrowania tego wtryskiwacza common rail:
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.
Techniczne Protokoły Diagnostyki i Serwisu
Zweryfikowane procedury warsztatowe, progi pomiarowe i wytyczne serwisowe dla tego podzespołu.