04E127025G
BOSCH 04E127025G Yüksek Basınç Pompası VW Golf 7 Passat Audi A3
04E127025D, 0261520261, 0261520262, HPP0021Integrated Fuel Metering Solenoid Valve N290-200 barUyumlu Araçlar ve Motorlar
| Araç | Motor | Model Yılları |
|---|---|---|
| Volkswagen Golf Mk7 / Jetta / Passat / Tiguan | Volkswagen / Audi EA211 1.4L & 1.5L TSI / TFSI (CZDA / CZEA / CHPA / DADA) | 2013-2020 |
| Audi A3 8V / Q3 8U | Volkswagen / Audi EA211 1.4L & 1.5L TSI / TFSI (CZDA / CZEA / CHPA / DADA) | 2013-2019 |
Teknik Özellikler
| Özellik | Değer |
|---|---|
| Çalışma BasıncıTemel Değer | |
| Pump Technology | Single Plunger Mechanical Camshaft-Driven HPFP |
| Flow Control | Integrated Solenoid Fuel Metering Valve (N290) |
| Mounting Flange Torque | 20 N·m |
| High Pressure Line Torque | 27 N·m |
| Drive Type | Intake Camshaft Tri-Lobe Drive with Roller Tappet |
| Fuel Type | Gasoline / Premium Unleaded Direct Injection |
| OE Cross References | 04E127025G, 04E127025B, 04E127025D, 0261520261, 0261520262 |
| Failure Symptoms | Long crank on warm engine, P0087 low rail pressure, hesitation under load, limp mode |
| Diagnostic Test | Measure LPFP lift pressure (4-7 bar) vs HPFP peak rail pressure (140-200 bar) |
Uyumlu Yakıt Enjektörleri (Yakıt Devresi Grubu)
Doğrudan bu yüksek basınç pompasıyla beslenir. Marş sırasında ray basıncı yükselmezse enjektör geri dönüş miktarını kontrol edin.
Montaj İpuçları
- [
- "Disconnect 12V battery and relieve high-pressure fuel system residual pressure via scan tool or low-pressure port.",
- "Disconnect electrical connector from fuel metering valve N290 and unthread low-pressure feed hose.",
- "Counter-hold fitting and loosen high-pressure steel rail flare nut using a flare nut wrench.",
- "Evenly back out the two M6 mounting bolts half a turn at a time to prevent uneven spring tilting pressure.",
- "Inspect roller tappet in the cylinder head bore for scuffing, flat spotting, or excessive play; replace if worn.",
- "Lubricate new O-ring with clean motor oil, seat pump squarely, and torque mounting bolts alternately to 20 N·m.",
- "Hand-thread high-pressure line flare nut until seated, then torque precisely to 27 N·m; reconnect N290 plug.",
- "Cycle ignition to pressurize low-pressure circuit, verify zero fuel leaks around fittings, and clear stored DTCs."
- ]
Ariza Kodlari (DTC) ve Teshis Protokolleri
Bu common rail enjektorunde asinma, devre arizasi veya kalibrasyon kaymasi olustugunda tetiklenen yaygin ariza kodlari (DTC):
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.
Teknik Arıza Teşhis ve Servis Protokolleri
Bu parça grubu için doğrulanmış atölye prosedürleri, test eşik değerleri ve servis talimatları.