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SKU:
NLT2T00610
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Fuel Lift Pump for 1989–1993 Dodge D250 D350 W250 W350 5.9L Cummins – 3966154
$63.49
In Stock
$63.49
Sale price
$63.49
Regular price
This mechanical fuel lift pump fits supported 1989–1993 Dodge D250, D350, W250 and W350 trucks with the 5.9L 12-valve Cummins diesel and cross-references 3966154.
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Compatible Models
We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.
Compatible equipment / model
| Application | Models / Details |
|---|---|
| Dodge 5.9L Cummins | 1989–1993 D250, D350, W250, W350 |
| Engine family | Cummins 5.9L B-series / 6BT 12-valve, when equipped with the matching mechanical pump |
Product Overview
On first-generation 5.9L Cummins trucks, the lift pump feeds diesel from the tank toward the injection pump. As the diaphragm and internal valves wear, the truck can become harder to start, lose fuel prime, stumble under load, or show signs of fuel leakage around the pump.
The 3966154 pump family is cross-referenced under several Cummins and aftermarket numbers. Matching the truck year, 5.9L B-series configuration, mounting flange, and line connections helps separate it from later 1994–1998 12-valve pump arrangements.
Key Features & Performance
- Mechanical lift/transfer pump for 1989–1993 5.9L Cummins applications
- Supports low-pressure fuel delivery to the diesel injection system
- Common cross-references include 3901425, 3904374, 3928143, 3966154, 3970880 and 4983584
- Application-specific fit for first-generation Dodge D/W-series diesel trucks
Specifications & Reference Numbers
- Primary reference: 3966154
- Additional references: 3901425; 3904374; 3928143; 3970880; 4983584
- Pump type: Mechanical fuel lift / transfer pump
Before You Order
Confirm the truck is the 1989–1993 5.9L application and compare the mounting flange and fuel-line arrangement. The later 1994–1998 Cummins 12-valve setup uses a different commonly listed pump.
Frequently Asked Questions
Q: What does the lift pump feed?
A: It supplies low-pressure fuel from the tank side of the system to the injection pump.
Q: What else should be checked if the truck loses prime?
A: Inspect filters, rubber fuel lines, fittings, tank pickup and air leaks along with the lift pump.