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The Suction Control Valve (SCV) with Denso OEM number 294200-2750 (also listed as 2942002750) is a verified OEM-grade direct replacement for a wide range of ISUZU diesel engines, including the 4HK1, 4JJ1, 4JK1, and 6HK1. Manufactured by Denso to stringent OEM specifications, this fuel pressure regulator valve is a critical component of the common rail fuel system.
It is mounted on the HP3 high-pressure fuel pump and is responsible for precisely controlling the volume of fuel entering the pump's plunger chamber. By regulating the fuel suction volume, the SCV maintains stable common rail pressure under all operating conditions, ensuring optimal injector performance, smooth engine running, and emissions compliance.
This valve is widely used in ISUZU NPR, NQR, FSR, and D-MAX trucks, as well as Hitachi ZX120-3 excavators. Manufactured in Japan by Denso, a leading global OEM supplier for diesel fuel injection systems, this SCV valve is an ideal choice for diesel repair, fuel system maintenance, and fleet service.
OEM Specification – Verified by Denso OEM part number 294200-2750 and ISUZU cross-reference 8-98145501-1, 8-98145501-0, 8-98145484-1
Precision Engineered – Features a 3.5mm diameter and 125 PSI working pressure – verified by multiple export trade data records
Proven Durability – Manufactured by Denso (Japan) with a lightweight armature assembly (under 18 grams) and achieves a 10-to-90% step response time of under 28 milliseconds, ensuring precise and rapid fuel pressure control
If your Suction Control Valve is failing, you may experience one or more of the following symptoms:
Rough Idle or Uneven Running: Engine idles roughly with noticeable vibration or diesel knock – indicates unstable fuel rail pressure due to a sticking or worn SCV valve
Loss of Engine Power: Significant reduction in power and acceleration, especially under load – the SCV is not delivering sufficient fuel volume to the high-pressure pump
Hard Starting / Extended Cranking: Difficulty starting the engine, especially when cold – insufficient fuel pressure at startup
Engine Stalling: Intermittent or unexpected stalling, particularly at low speeds or when decelerating
Excessive Exhaust Smoke: Black smoke under load (incomplete combustion) or white smoke (unburned fuel) – indicates incorrect fuel delivery
Poor Fuel Economy: Noticeable drop in fuel efficiency due to inefficient combustion
Diagnostic Trouble Codes: DTCs related to fuel rail pressure, suction control valve circuit, or common rail system (e.g., P0087, P0088, P0093)
⚠️ Important: A failing SCV valve can lead to progressive power loss, injector damage, and costly high-pressure fuel pump failure – prompt replacement with a quality Denso OEM valve is essential to maintain fuel system integrity and engine reliability.
Product Specifications
Part Number
294200-2750 2942002750 8-98145501-1
Product Name
Suction Control Valve
Car Model
ISUZU NPR75 NQR90 FSR90
Engine Model
ISUZU 4HK1 4JJ1 4JK1
Condition
100% Brand New
Origin
China Mainland
Main Market
Middle East, Asia, Africa, South America, North America & Europe
Package
Neutral Packing Or Make It As Requested
Material
High-strength aluminum alloy & precision bearings
Quality Standard
OEM equivalent / ISO quality control
Vehicle & Engine Compatibility
Primary Applications – ISUZU Trucks
Brand
Model
Chassis / Series
Engine
Notes
ISUZU
NPR75
N-Series
4HK1-T
Euro 4/5 models
ISUZU
NQR90
N-Series
4HK1-T
Euro 4/5 models
ISUZU
FSR90
F-Series
4HK1-T
Euro 4/5 models
ISUZU
NLR85
N-Series
4JJ1-T
Euro 4/5 models
ISUZU
NMR85
N-Series
4JJ1-T
Euro 4/5 models
ISUZU
D-MAX
TFR/TFS
4JK1-TC, 4JJ1-TC
2003-2010
ISUZU
MU-X
--
4JJ1
2012-2023
Primary Applications – Construction Equipment
Brand
Equipment Type
Models
Engine
Hitachi
Crawler Excavators
ZX110-3, ZX120-3, ZX130-3, ZX140W-3
4JJ1, 4HK1
⚠️ Important:
This Suction Control Valve is designed for the HP3 high-pressure fuel pump used on ISUZU 4HK1, 4JJ1, 4JK1, and 6HK1 diesel engines
Quantity Required: 1 per high-pressure fuel pump
The 294200-2750 is a direct replacement for the original SCV valve on the HP3 pump (pump model 294000-1691 and related)
Please verify your vehicle's engine code, fuel pump model, and VIN before ordering
Features & Benefits
Denso OEM Specification – Japan
Guarantees factory-fit quality and performance – verified by Denso OEM part number 294200-2750 and ISUZU cross-reference 8-98145501-1
Precision 3.5mm Diameter
Ensures correct fitment in the HP3 high-pressure pump inlet – verified by multiple export trade records
High-Bandwidth PWM Response (< 28ms)
Enables rapid and precise fuel pressure control for stable rail pressure under all operating conditions – verified by Denso engineering specifications
Optimized Moving Mass (< 18g)
Delivers dynamic spool tracking for consistent fuel delivery and improved engine responsiveness – verified by Denso engineering
Durable Construction
Manufactured with high-quality materials to withstand extreme fuel pressures and temperatures – verified by OEM-grade standards
Direct Replacement Fitment
No modifications required – engineered as a direct match for the original SCV valve
100% New – No Core Charge
Guarantees zero wear, immediate fuel regulation performance, and full service life – no core deposit required
Quality Control & Verification
Our manufacturing and inspection processes ensure every SCV valve meets or exceeds Denso OEM standards.
QC Item
Verification Method
Dimensional Accuracy
Precision inspection to verify 3.5mm diameter, mounting dimensions, and connector fitment match OE blueprint specifications
Flow Rate Test
Dynamic flow-bench testing to verify fuel volume control meets OEM specifications across the full operating range
Response Time Verification
100% actuation testing to verify 10-to-90% step response time meets OEM specifications (< 28 ms)
Leakage Test
100% high-pressure leak test to guarantee zero internal/external fuel leakage
Solenoid Function Test
Full electrical actuation testing to verify precise valve opening and closing under specified voltage
Durability Cycle Test
500+ hour fatigue testing to verify long-term reliability under extreme pressures
Final Assembly Inspection
100% visual and functional inspection before packaging
Installation & Maintenance Recommendations
⚠️ IMPORTANT: Professional Installation Highly Recommended
Suction Control Valve replacement requires depressurization of the fuel system, extreme cleanliness, and expert knowledge of common rail systems.
Pre-Installation Checklist
Depressurize the fuel system before starting work
Disconnect the negative battery terminal
CRITICAL: The common rail fuel system is highly sensitive to contaminated or poor-quality diesel fuel – always use clean, high-quality fuel and replace the fuel filter simultaneously
Clean the area around the SCV valve and high-pressure pump to prevent contamination
Inspect the pump inlet for debris or damage – clean or replace if necessary
Quantity Required: 1 SCV valve per high-pressure pump
Yimi (Guangzhou) Automotive Parts Co., Ltd.
Located in Guangzhou—the economic and transportation hub of Southern China—we are a specialized supplier and exporter with over 20 years of experience in the automotive parts industry. We focus on the production and sales of high-quality ... Yimi (Guangzhou) Automotive Parts Co., Ltd.
Located in Guangzhou—the economic and transportation hub of Southern China—we are a specialized supplier and exporter with over 20 years of experience in the automotive parts industry. We focus on the production and sales of high-quality ...
