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294000-0630 294000-0632 294000-0633 22100-E0080 Fuel Injection Pump for Isuzu 4HK1 6HK1
| MOQ: | 1 |
| Price: | 299 |
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Product Name
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Common Rail Diesel Fuel Injection Pump
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Place of Origin
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Wuhan,China
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Warranty
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12 Months
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Delivery time
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3-5 Days, subject to the order quantity
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Quality
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100% Tested
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Packing
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Customer Requirement
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Service
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After-Sales Service
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Size
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Standard Size
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Payment
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TT,Trade Assurance,PayPal,Credit Card
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Advantage
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Perfect Fit
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Primary Vehicles (Isuzu Trucks)
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Isuzu Elf (N-Series / NPR / NQR)
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Isuzu Forward (F-Series / FRR / FSR)
Compatible Engines
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Isuzu 4HK1 (4.8L / 5.2L 4-Cylinder Turbo Diesel)
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Isuzu 6HK1 (7.8L 6-Cylinder Turbo Diesel)
Company Info
Wuhan Jinhong Auto Parts Co., Ltd. is a manufacturer and exporter of common rail fuel injectors integrating manufacturing,processing and R & D.
Our factory has a complete and scientific management system and professional product development team, products have been advancing with The Times, quality is also constantly improving, product quality and service have been widely recognized by the industry. Our company has its own factory, combined with the sales model of trade factory, we can provide customers with a full range of services. In addition, our company has international logistics partners to reduce transportation costs for customers. Our company is a leading manufacturer and supplier of Marine parts and auto parts in China. At the same time, we have established partnerships with hundreds of factories specializing in the production of various high-quality auto parts.
Our goal is to provide the best service at the best price, your satisfaction is our best return. Look forward to working with you. Welcome friends from all walks of life to visit, guidance and business negotiations.
Q1: What specific type of pump architecture is the 294000-0630?
A: It is a DENSO HP3 type high-pressure supply pump. It uses a dual-plunger design driven by a three-lobe cam to continuously deliver high-pressure diesel to the common rail. It relies on an integrated Suction Control Valve (SCV) on the inlet side to regulate rail pressure.
Q2: What are the primary symptoms that indicate this pump is failing on an Isuzu 4HK1/6HK1 engine?
A: When this pump degrades or fails, the truck will typically exhibit:
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Limp Mode / Power Drastically Reduced: The engine ECU limits RPMs to protect the system.
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Hard Starting or No-Start (When Hot): Internal wear prevents the pump from building the minimum required cranking pressure (~20-25 MPa) to fire the injectors, especially when the fuel is hot and thin.
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Engine Surging or Erratic Idle: The engine RPM hunts up and down due to unstable rail pressure.
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Sudden Stalling: The engine cuts out under heavy load or acceleration.
Q3: What Diagnostic Trouble Codes (DTCs) are commonly triggered by this pump?
A: On Isuzu diagnostic scanners (like Tech 2 or G-IDSS), you will usually pull these codes:
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P0088: Fuel Rail Pressure Too High (often a stuck SCV).
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P0089: Fuel Pressure Regulator Performance (pressure deviates from target).
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P0093: Large Fuel System Leak Detected (can be triggered if the pump cannot maintain target pressure under load).
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P1093 / P1094: Fuel Pressure Low During Light/Heavy Load.
Q4: If the truck has a surging idle, do I need to replace the entire 294000-0630 pump?
A: Not necessarily. A surging idle or intermittent pressure spike is most frequently caused by a sticky or worn Suction Control Valve (SCV) rather than mechanical pump failure.
Diagnostic Tip: Remove the SCV and check for fine metal debris. If there are no metal shavings, replacing just the SCV component can solve the issue. If you find bright metal flakes, the internal plungers of the pump are flaking, and the entire pump must be replaced along with a system flush.
Q5: What is the primary root cause of catastrophic failure for this pump model?
A: Fuel contamination. The DENSO HP3 relies completely on diesel fuel for its internal lubrication. Water contamination destroys the fuel film, leading to immediate metal-on-metal friction, overheating, and metal flaking. Poor quality fuel or worn fuel filters allow abrasive particles to score the precision plungers, causing internal pressure loss.
