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Cummins 3.9L Fuel Injector Pump 1994-2004: OEM 3963966RX

CUMMINS 3.9L FUEL INJECTOR PUMP 1994-2004: OEM 3963966RX

Shipping ICON

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY

WARRANTY ICON

WARRANTY
1M MILES OR 1 YEAR

$2,495.00

CORE CHARGE:

$1,200.00
iCORE DISCLAIMER: The CORE charge is a 30 day hold and will not be processed as long as the CORE is returned within 30 days. If you do not have a CORE or fail to return the CORE within 30 days, the CORE charge hold amount will be processed at that time.

AVAILABILITY IN STOCK
OEM NUMBER3963966RX
PART TYPEFuel Injector Pump
BRANDTamerx Diesel Products
ENGINE MAKECummins
ENGINE TYPE3.9L
YEAR1994-2004
PART NUMBER3963966RM

PRODUCT DESCRIPTION

This is a Remanufactured Tamerx Fuel Injector Pump, Tamerx part number 3963966RM ( OEM Part Number 3963966RX ). All parts are proudly remanufactured in the U.S.A. to the highest of OEM standards, and improvements are often applied to the original design in the remanufacturing process. This part is primarily made for a Cummins 3.9L, production years 1994-2004, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here

OEM NUMBERS

Primary OEM3963966RX
Additional OEM0 460 424 287, 0 460 424 355, 0460424287, 0460424355, 3963966RX

ADDITIONAL DETAILS

CONDITIONRemanufactured
UPC / Barcode
WEIGHT16.00 LBS

SHIPPING OPTIONS

Ship Weight : 16.00 LBS
UPS Ground, 2nd Day Air, Next Day Air

SHIPPING POLICY

Tamerx Diesel Products ships via UPS Ground. Next day air shipping can be arranged for a reasonable price of anywhere from $50.00 - $100.00 depending on the weight of the product and your location. We will do everything we can to make sure that you get the service you need. We understand how important it is to receive your order as quickly as possible.
In most cases Tamerx Diesel Products only needs one address, as long as your product is shipping to the same location as your billing information. In order to eliminate credit card fraud, your billing information must match the credit card you provide.

The terms, conditions, and details of our warranty vary from product to product. Specific warranty details can be found below.

Tamerx Diesel Products provides a replacement warranty on all of our parts. The duration and mileage limitations of the warranty vary by product and are specified on the product's detail page/item listing.

Please note that the warranty covers replacement of the part and the cost of shipping the replacement part to you only. It does not cover any shop, labor, towing, or any similar or related costs. This is not a "money back guarantee".

If you experience a problem with your part or it is not functioning properly, the correct warranty procedure is to call us at (510) 257-1777 (8:00 AM - 5:00 PM ET Monday through Friday). Be sure to have your order number and/or other relevant order information ready so we can easily locate your order and resolve your issue as quickly as possible. From that point, we will review with you any troubleshooting steps that may need to be taken and other areas or systems that can be checked to rule out external problems contributing to your part's issue. If a replacement is determined to be necessary, we will then arrange for your replacement part to ship out ASAP and issue any necessary return shipping labels and/or documents.

As is the case for the majority of the diesel products sold on Tamerx Diesel Products, your part's warranty is active as soon as you install it. In some other cases, warranty activation is contingent upon you sending us your core (i.e., your old part). Tamerx Diesel Products will provide you a return shipping label for parts that have a warranty with a core return condition. When we have received your core return, the part's warranty coverage begins. We reserve the right to void the product warranty if your core is not received within the allotted time, or if it isn't received at all. If the warranty for the diesel part you are purchasing has a core return requirement, it will be clearly noted on the product detail page/item listing.

What is a Core Charge?

A core charge (also called "core deposit") is similar to the deposit you might pay for a can or bottle of soda and is a standard requirement in the auto parts industry. For example, in many states, to promote recycling, you pay a deposit when you purchase a can of soda and receive your deposit back when you return the empty can. Many automotive parts have a core charge, or core price, that works in essentially the same way as a soda can deposit.

30 Day Core Charge Hold

You authorize Tamerx Diesel Products, to hold your credit card for the specified core charge amount and that you agree to return your core with 30 days of receiving the purchased part. When we have received your core return, the hold is released and the core charge payment is canceled.

The customer, or parts buyer, is responsible for any shipping costs associated with core returns unless otherwise specified in the product listing/detail page. Tamerx Diesel Products offers prepaid UPS shipping labels (SKU numbers UPS-CR1 and UPS-CR2) for use in returning your core that are available for purchase on our website during your shopping/order process.

The shipping label you will need to use for the core return is dependent upon what part you are purchasing. UPS-CR1 is good for cores weighing up to 20 pounds. UPS-CR2 is appropriate for shipping cores weighing 21 pounds or more. You must include enough information with the core return that clearly identifies it as a.) a Core Return, and b.) contains enough information we can use to clearly associate the core return with your order. Including a copy of the invoice or packing slip that came with the original shipment, clearly marked "Core Return", is ideal. Alternately, you can include a note marked as "Core Return" that includes your order number, full name and address, and phone number or other contact information. Failure to include this information with your returned core will most likely delay any due core credit being issued and/or delay any applicable warranty activation. Core returns need to be for the exact part purchased and cannot be damaged. Substituting another part in place of the part you have purchased is not acceptable.

All fluids must be drained.

If you have purchased a set or a parts package, you will need to return cores for all components of the set. For example, if you have purchaed a high pressure oil pump with an IPR valve, you will need to return both HPOP and IPR valve cores to receive proper credit. If you have purchased an EGR cooler/EGR valve package, your core return must consist of an EGR cooler core and an EGR valve core, or core credit will not be given.

Core Charges are often mandated by state legislature, and, as such, the actual core charge and taxes on the charge may vary depending on the state in which you buy your part. The Tamerx Diesel Products core charge presented to you online today with your item is representative of the most common core charge.


FITMENT CHART

YEARMAKEENGINE(S)
1994Cummins 3.9L
1995Cummins 3.9L
1996Cummins 3.9L
1997Cummins 3.9L
1998Cummins 3.9L
1999Cummins 3.9L
2000Cummins 3.9L
2001Cummins 3.9L
2002Cummins 3.9L
2003Cummins 3.9L
2004Cummins 3.9L

PEOPLE ALSO ASKS | BLOG(S)

The fuel injector pump is the heart of your engine's fuel system, ensuring the precise delivery of fuel for optimal combustion. The Cummins 3.9L Fuel Injector Pump, OEM 3963966RX, is specifically designed to maintain and restore the efficiency of your engine, making it a critical component for engines manufactured between 1994 and 2004. This blog focuses on how upgrading to this fuel injector pump can significantly enhance your engine's performance and fuel efficiency.

Key Features and Benefits

Precision Fuel Delivery

  • Ensures accurate fuel injection timing, leading to better combustion and engine efficiency.
  • Helps maintain consistent engine power and responsiveness, especially under load.

Enhanced Fuel Efficiency

  • Optimizes the air-fuel ratio, reducing fuel consumption and lowering operating costs.
  • Improves overall fuel economy, allowing your engine to run more cost-effectively.

Durable and Reliable Construction

  • Built to withstand the demanding conditions of heavy-duty engine use.
  • Provides long-lasting performance, reducing the frequency of replacements and maintenance.

Perfect Compatibility

  • Specifically engineered for Cummins 3.9L engines from 1994-2004.
  • Guarantees a seamless fit, ensuring easy installation and integration with your existing engine system.

The Cummins 3.9L Fuel Injector Pump 1994-2004: OEM 3963966RX is essential for restoring and maintaining your engine’s fuel efficiency and performance. With features like precision fuel delivery, enhanced fuel efficiency, and durable construction, this injector pump ensures that your Cummins engine operates at its best. Investing in this OEM part will help keep your engine running smoothly and reliably, providing the power and efficiency you need for demanding tasks.

 
4o

The fuel injector pump is a crucial component in diesel engines, responsible for delivering the precise amount of fuel to the injectors at the correct pressure and timing. When the fuel injector pump starts to fail, it can lead to a variety of engine performance issues that can affect your vehicle's reliability and efficiency. Identifying the symptoms of a failing fuel injector pump early can help you avoid more severe problems and costly repairs. In this blog, we’ll explore the common signs that your fuel injector pump may be failing.

Common Symptoms of a Failing Fuel Injector Pump

  • Difficulty Starting the Engine
    •  One of the earliest signs of a failing fuel injector pump is difficulty starting the engine. If the pump is not delivering enough fuel to the injectors, the engine may struggle to start or require multiple attempts to get going.
  • Poor Engine Performance
    • A failing fuel injector pump can cause the engine to run poorly, with symptoms such as sluggish acceleration, reduced power, and difficulty maintaining speed, especially under load or during acceleration.
  • Engine Misfires
    • Inconsistent fuel delivery due to a faulty injector pump can lead to engine misfires. Misfires occur when the air-fuel mixture in the combustion chamber does not ignite properly, leading to rough running and a noticeable drop in performance.
  • Excessive Smoke from the Exhaust
    •  If your vehicle is producing more smoke than usual, it could be a sign of a failing fuel injector pump. Black smoke may indicate that the engine is receiving too much fuel, while white or blue smoke could suggest fuel is leaking or burning improperly.
  • Decreased Fuel Efficiency
    • A malfunctioning fuel injector pump can disrupt the optimal air-fuel mixture, causing the engine to consume more fuel than necessary. If you notice a sudden drop in fuel efficiency, it could be due to issues with the injector pump.
  • Engine Stalling
    •  A failing fuel injector pump may cause the engine to stall, particularly at low speeds or when idling. This happens because the pump is not supplying a consistent flow of fuel to keep the engine running smoothly.
  • Check Engine Light
    •  The check engine light may illuminate if the fuel injector pump is failing. While this light can indicate various issues, a diagnostic scan can reveal if the injector pump is the source of the problem.

Recognizing the symptoms of a failing fuel injector pump is essential for maintaining your vehicle’s performance and avoiding more serious engine issues. If you experience difficulty starting the engine, poor performance, or excessive exhaust smoke, it’s important to have your fuel injector pump inspected and repaired by a professional mechanic. Addressing injector pump issues early can save you from costly repairs and ensure your engine continues to run smoothly. For more information on vehicle maintenance and to find high-quality replacement parts, visit our website. Keeping your fuel injector pump in good condition is key to ensuring your vehicle’s reliability and efficiency.

Cummins Fuel Injector Pumps