GM
12668635
Voir les spéc.
SolenoidGasoline Direct Injection (GDI)Euro 255
GM 12668635 Injecteur SIDI Buick Enclave Chevrolet Blazer Cadillac XT6 3.6L LGX
Plateforme moteur:GM 3.6L High Feature V6 SIDI (LFX / LLT / LGX / LFY) →
RÉFÉRENCE OE
12668636, 12684125, 12684126, 217-3445, FJ1296SOUPAPE DE COMMANDE
-NEZ D'INJECTEUR
-PRESSION DE SERVICE
150 barNORME ANTIPOLLUTIONTier 2 Bin 5 / Euro 5 / LEV II
GARANTIE12 Mois
02
Compatibilité véhicules et motorisations
03
Spécifications techniques
| Spécification | Valeur |
|---|---|
| Part Number / SKU | 12668635 |
| Manufacturer Brand | GM |
| Component Type | Direct Fuel Injector |
| Engine Application | General Motors 3.6L V6 DOHC 24V SIDI Direct Injection with AFM (LGX / LFY) |
| Pression de serviceSpéc. clé | |
| Mounting Torque (Flange / Bracket) | 10 N-m (89 lb-in) |
| Fuel Line / Rail Torque | 25 N-m (18 lb-ft) |
| Codes défauts fréquents | P0300, P0301, P0172, P0175 |
04
Conseils de montage
- 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 10 N-m (89 lb-in), and torque fuel line fittings to 25 N-m (18 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.
05
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:
P0087Critical
Fuel Rail / System Pressure Too Low
Excessive internal backleak from worn control valve seats drops common rail pressure below target under engine load.
P0201 - P0208High
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.
P0300 / P0301+High
Cylinder Misfire & Balancing Deviation
Carbon-clogged nozzle spray holes or missing IMA calibration causes uneven cylinder contribution. Recode ECM and verify washer seating.
P0088High
Fuel Rail / System Pressure Too High
Spill line backpressure or stuck metering valve prevents rail depressurization, creating overpressure risks under load.
PROTOCOLES D'ATELIER
Protocoles Techniques de Diagnostic & Réparation
Procédures d'atelier vérifiées, seuils de test et guides d'intervention pour cet ensemble.
DIAGNOSTIC COMMON RAIL D
Lire le protocole techniqueDiagnostic Régulateur Débit IMV SCV & Test P0088 CR
PROTOCOLE DE DIAGNOSTIC OBD-II
Lire le protocole techniqueGuide de diagnostic P0087 : Pression de rampe trop basse
SOP DIAGNOSTIC ATELIER DIESEL
Lire le protocole techniqueDiagnostic Équilibrage Cylindre & Déviation Injecteur
PROTOCOLE D
Lire le protocole technique