Pickup Fuel Sending Unit FMSU-8DER for Ford F-250 F-350 7.3L V8 1992-1993
This fuel pump is engineered as a direct replacement for the Ford F-250 F-350 7.3L V8 1992-1993. Manufactured to meet or exceed OEM specifications, it delivers reliable performance in demanding conditions. Each unit is tested for fuel flow, pressure rating, and durability before leaving the factory to ensure consistent quality across every order.
Vehicle Compatibility
| Application | Details |
|---|---|
| Ford F | 250 F-350 7.3L V8 1992-1993 Replacement Part Number: FMSU-8DER, FMSU8DER, 34405006 Specification: Size: 33.8*15.7*12.5cm Applications: Fit for |
Replaces OEM Part Numbers
FMSU-8DER • FMSU8DER • 34405006 • Specification • 12.5cm • 1992-1993
Signs You Need a Replacement
If your equipment is showing any of these symptoms, the fuel pump may be the cause:
- Engine cranks but won’t start — The pump may have lost prime or stopped delivering fuel. Check for fuel at the filter outlet before replacing the pump.
- Stalling under load — A weak pump can’t maintain pressure at high demand. The engine runs fine at idle but dies when you put it to work.
- Fuel pressure warning (if equipped) — Modern Ford equipment monitors fuel rail pressure. A low-pressure warning often means the pump is failing.
- Loud whining from fuel system — A failing pump makes a high-pitched whine that gets louder as it warms up. Normal pump noise is a low hum.
- Air in fuel lines — If you see bubbles in the transparent fuel line or the primer bulb won’t stay firm, the pump may be drawing air through a worn seal.
- Excessive return flow — Too much fuel returning to the tank instead of reaching the injectors indicates internal pump wear.
Before You Replace the Pump
Before replacing the pump, check the fuel filter and fuel lines for restrictions. A blocked filter causes the same symptoms as a failing pump on Ford equipment. When installing the new pump, fill it with clean fuel before connecting the lines — this reduces priming time and prevents dry-run damage. After installation, bleed the system fully and check for leaks at all connection points. Replace the fuel filter at the same time as the pump to protect the new unit from debris.
Frequently Asked Questions
Which Ford models does this part fit?
Refer to the Vehicle Compatibility table above for the full list of Ford models. Each listing includes the body type, engine, and production years. Match your vehicle’s engine code (stamped on the engine block) against the listed codes to confirm.
Can I cross-reference FMSU-8DER with FMSU8DER?
Yes. Both FMSU-8DER and FMSU8DER are interchangeable OEM numbers for this part. They refer to the same component with the same specifications, just different part number revisions.
I have a 7.3L engine – which version do I need?
This part covers 7.3L applications. To narrow down the exact fit, check your vehicle’s model year and engine code. The same displacement can have multiple engine variants with different fuel systems or emissions equipment.
My vehicle is a 1992 model – is it covered?
The compatibility range for this part includes 1992-1993. The 1992 model year falls within this range, but verify the engine code and body type match. Mid-year production changes sometimes mean two vehicles from the same model year use different parts.
Reviews
There are no reviews yet.