16790-5A2-A01
KEIHIN 16790-5A2-A01 Pompe Haute Pression Honda Accord CR-V 2.4L K24W
GE190-019, 296100-0040Integrated Electromagnetic Flow Control Solenoid-200 barSpécifications techniques
| Spécification | Valeur |
|---|---|
| Type de système | Keihin Mechanical Single-Piston High Pressure Fuel Pump |
| Pression de serviceSpéc. clé | |
| Drive Mechanism | Exhaust camshaft 4-lobe drive profile operating roller tappet |
| Mounting Flange Bolt Torque | 12 N·m (tighten evenly in progressive alternating passes) |
| High Pressure Pipe Torque | 28 N·m Flare Nut Connection |
| Flow Control Solenoid Resistance | 8.5 - 10.5 Ω at 20°C (PCM PWM duty cycle regulated) |
| Codes défauts fréquents | P0087 (Fuel Rail Pressure Low), P0088 (Rail Pressure High), P0172 (Fuel System Rich - Oil Dilution) |
| Workshop Precaution | Inspect camshaft roller follower for pitting and replace pump O-ring with clean engine oil lubrication |
Pompe haute pression associée (Ensemble circuit de carburant)
Fonctionne sur le même circuit haute pression Common Rail. En cas de chute de pression (P0087), vérifier le débit de la pompe avant de remplacer les injecteurs.
Conseils de montage
- [
- {
- "step": 1,
- "title": "Depressurize Fuel Rail & Remove High Pressure Pump Cover",
- "instruction": "Depressurize fuel lines via fuel pump relay removal. Remove engine cover and pump sound insulation bracket atop cylinder head."
- },
- {
- "step": 2,
- "title": "Disconnect Low Pressure Feed Line & Steel High Pressure Flare Nut",
- "instruction": "Disconnect low pressure rubber supply line with quick-release tool. Unscrew high pressure steel line flare nut (28 N·m) with backup counter-wrench."
- },
- {
- "step": 3,
- "title": "Unfasten Mounting Bolts Evenly & Inspect Roller Tappet",
- "instruction": "Loosen two mounting bolts (12 N·m) alternately in half-turn steps to relieve spring tension. Lift pump and inspect roller tappet and camshaft lobe."
- },
- {
- "step": 4,
- "title": "Fit New O-Ring, Torque Bolts Evenly & Verify Pressure Integrity",
- "instruction": "Install replacement O-ring with fresh engine oil coating. Torque bolts alternately to 12 N·m. Tighten steel fuel line to 28 N·m. Start engine and verify zero fuel leaks."
- }
- ]
Codes de Defaut (DTC) & Protocoles de Diagnostic
Codes de defaut diagnostiques (DTC) courants déclenchés lorsque cet injecteur common rail subit une usure, des pannes de circuit ou une dérive d'étalonnage:
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.
Protocoles Techniques de Diagnostic & Réparation
Procédures d'atelier vérifiées, seuils de test et guides d'intervention pour cet ensemble.