8-98145455-0 294200-2760 Common Rail SCV Suction Control Valve Application For Toyota Isuzu
Product name: scv valve
2.Material: Iron
3.application:Isuzu
4.Origin: China made
5.delivery time : 5-7 days
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Product Introduction
Product Introduction: SCV Valves 8-98145455-0 & 294200-2760
The Suction Control Valve (SCV) is a critical component in diesel high-pressure common rail systems, responsible for precisely regulating fuel supply pressure. This directly impacts engine performance, fuel efficiency, and emissions compliance. Below are detailed specifications for 8-98145455-0 and 294200-2760 SCV valves, including compatible fuel pumps, vehicle applications, model years, and cross-reference part numbers.
SCV Valve 8-98145455-0
Compatible Fuel Pumps & Engines
Fuel Pump: Bosch CP4.2 High-Pressure Common Rail Pump
Engine Applications:
GM Duramax 2.8L (LWN, 2016-2023)
Ford EcoBlue 2.0L (2018-2023)
Vehicle Fitment
Chevrolet: Colorado (2016-2023), Silverado 1500 (select diesel models)
Ford: Ranger (2019-2023), Transit Custom (2020-2023)
Interchange Part Numbers
8-98145484-1 (partial compatibility)
Bosch 0281002875
SCV Valve 294200-2760
Compatible Fuel Pumps & Engines
Fuel Pump: Denso HP4.2 High-Pressure Common Rail Pump
Engine Applications:
Toyota 1GD-FTV (2.8L Turbo Diesel, 2017-2023)
Isuzu 4JJ3-TCX (3.0L Turbo Diesel, 2019-2023)
Vehicle Fitment
Toyota: Hilux (2017-2023), Land Cruiser Prado (2018-2023)
Isuzu: D-Max (2019-2023), MU-X (2020-2023)
Interchange Part Numbers
294200-2750 (standard version)
294200-2761 (cold-climate optimized)
Key Product Features
Symptoms: Loss of power, rough idling, hard starting, poor fuel economy.
Causes: Clogging from contaminated fuel, worn valve seat, or solenoid coil failure.
Prevention: Use high-quality diesel, replace fuel filters regularly, and avoid running on low fuel levels.
Replacement Recommendations
Precision Control: PWM signal modulation maintains pressure stability (±3bar).
Enhanced Durability: Molybdenum alloy valve core improves wear resistance (3x longer lifespan).
Diagnostic Capability: Some models support fault memory storage for troubleshooting.
Fuel Pump Operating Principle
The SCV valve regulates fuel flow into the high-pressure pump via electromagnetic actuation, ensuring stable rail pressure (300-400bar at idle, 1800-2000bar under load). Failure may cause power loss or trigger DTCs (e.g., P0087, P0251).
Testing Parameters for SCV Valves 8-98145455-0 & 294200-2760
For the 8-98145455-0 (compatible with Bosch CP4.2 high-pressure pump) and 294200-2760 (compatible with Denso HP4.2 high-pressure pump) SCV valves, the following key parameters and test items must be verified:
Electrical Parameter Testing
Coil Resistance (at 20°C):
8-98145455-0: Standard value 2.8Ω ± 0.3Ω
294200-2760: Standard value 3.2Ω ± 0.3Ω
Fault Criteria: <2Ω (short circuit) or >5Ω (open circuit) requires replacement.
PWM Signal Analysis (oscilloscope measurement):
Frequency: 150-850Hz (varies with ECU command)
Duty Cycle: 15%-85% (idle to full load)
Current Waveform: Should show a clean square wave; flat tops or oscillations indicate valve sticking.
2. Fuel System Pressure Testing
Low-Pressure Side (Inlet):
Standard: 4-6 bar (idle)
Minimum Starting Pressure: ≥3.2 bar (lower values may cause fuel starvation).
High-Pressure Rail (via diagnostic tool):
Idle: 300-400 bar
Full Load: 1800-2000 bar (Bosch CP4.2) / 2000-2200 bar (Denso HP4.2)
Abnormal Fluctuation: >±100 bar suggests SCV valve failure.
3. Dynamic Response Testing
Valve Response Time:
Normal: <8ms (from ECU command to stabilized pressure)
Delayed/Sticking: >15ms requires cleaning or replacement.
Leakage Test (Pressure Retention):
Standard: ≤5% pressure drop in 5 minutes
Excessive Drop: Indicates worn valve seat or seal failure.
4. Diagnostic Trouble Code (DTC) Analysis
Common SCV-related DTCs and corresponding checks:
P0087 (Low Fuel Pressure) → Inspect low-pressure pump, filter, and SCV power supply.
P0251 (SCV Control Out of Range) → Measure coil resistance and ECU output signal.
P0191/P0193 (Rail Pressure Anomaly) → Verify PWM duty cycle matches pressure demand.
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