1999 Ford Taurus Fuel Pump: Complete Guide to Diagnosis, Replacement, and Cost

If your 1999 Ford Taurus is experiencing starting problems, stalling, or poor engine performance, the most likely culprit is a failing fuel pump. The fuel pump is located inside the fuel tank and is responsible for delivering fuel from the tank to the engine. For a 1999 Ford Taurus with a 3.0L V6 engine (either gas or flex-fuel), the average replacement cost ranges from $1,015 to $1,286 when done by a professional mechanic, but you can save significantly by doing it yourself with a replacement pump kit costing between $11.79 and $48.95. This guide will walk you through the symptoms, testing procedures, replacement steps, and where to buy a reliable replacement.

1. Symptoms of a Failing Fuel Pump

Before you start replacing parts, it's important to confirm that the fuel pump is indeed the problem. Common symptoms of a failing fuel pump on a 1999 Ford Taurus include:

• Engine cranks but won't start: This is the most obvious sign. If the engine turns over but never fires, the fuel pump may not be delivering fuel to the engine.
• Stalling or hesitation: A weak fuel pump may cause the engine to stall, especially under load or when accelerating.
• Whining noise from the fuel tank: A healthy fuel pump makes a quiet humming sound when the ignition is turned on. A loud whining or grinding noise indicates the pump is failing.
• Loss of power or sputtering: If the pump cannot maintain proper fuel pressure, the engine may sputter or lose power during driving.
• Check Engine Light: A failing fuel pump can trigger diagnostic trouble codes related to fuel system pressure.

2. How to Test the Fuel Pump (1999 Ford Taurus 3.0L V6)

Before buying a new pump, test the fuel pressure to confirm the pump is the issue. This is a straightforward process you can do with a fuel pressure test gauge.

Fuel Pressure Specifications for 1999 Ford Taurus 3.0L:

• Key On, Engine Off (KOEO): 37-43 PSI
• Key On, Engine Running (KOER): 26-45 PSI

Step 1: Locate the Schrader Valve
The Schrader valve (fuel pressure test port) is located on the fuel injector rail for cylinders 4, 5, and 6, near the alternator.

Step 2: Connect the Fuel Pressure Gauge
Place a shop towel around the Schrader valve to catch any fuel. Attach the fuel pressure gauge to the valve.

Step 3: Test with Key On, Engine Off
Have a helper turn the ignition key to the "ON" position (do not start the engine). The gauge should read between 37 and 43 PSI.

Step 4: Test with Engine Running
Start the engine and let it idle. The gauge should read between 26 and 45 PSI.

Interpreting Results:

• If the pressure is 0 PSI: The fuel pump is not working. Check the fuel pump relay and inertia switch first, then proceed to replace the pump.
• If the pressure is below specification: The pump is weak and should be replaced.
• If the pressure is within specification but the car still has symptoms: The issue may be elsewhere (e.g., fuel filter, injectors, or electrical connections).

3. How to Reset the Fuel Pump Inertia Switch

The 1999 Ford Taurus is equipped with an inertia fuel pump cut-off switch that automatically shuts off the fuel pump in the event of an accident. Sometimes, a hard jolt can accidentally trigger this switch, preventing the engine from starting.

To reset the switch:

• For sedan models: The switch is located inside the trunk, behind the carpeted liner, on the right-side inner fender. Press the small red button to reset.
• For wagon models: The switch is located behind the plastic service panel door, on the right side of the cargo area, near the rear hatch.

After resetting, turn the ignition to the "ON" position for a few seconds to prime the fuel pump, then start the engine.

4. Fuel Pump Replacement: Step-by-Step Guide

Replacing the fuel pump on a 1999 Ford Taurus requires dropping the fuel tank. This is a moderately difficult DIY job that will take 2-4 hours. Here is a summarized guide based on professional instructions.

Tools and Materials Needed:

• Floor jack and two jack stands
• Socket set and wrenches
• Fuel line disconnect tool
• Screwdriver, pliers, and a Torx wrench
• New fuel pump module or pump kit
• New O-ring seal and lock ring
• Fuel container and siphon pump
• Safety gear (gloves, goggles, fire extinguisher)

Step 1: Relieve Fuel System Pressure

• Remove the fuel pump relay from the fuse box.
• Start the engine and let it idle until it stalls.
• Crank the engine for 5 seconds to relieve residual pressure.
• Disconnect the negative battery cable.

Step 2: Drain the Fuel Tank

• Remove the gas cap.
• Use a siphon pump to drain as much fuel as possible into a gas can. This will make the tank lighter and easier to lower.

Step 3: Raise the Vehicle and Support the Tank

• Raise the rear of the vehicle with a floor jack and place it on jack stands.
• Position a floor jack with a block of wood under the fuel tank to support it.

Step 4: Disconnect Fuel Lines and Electrical Connectors

• Disconnect the three quick-connect couplings from the tubes at the tank. Label them for easy reassembly.
• Unplug the fuel pump electrical connector.
• Disconnect the fuel filter inlet tube.

Step 5: Lower the Fuel Tank

• Unfasten the two fuel tank support straps using a socket.
• Carefully lower the tank using the floor jack.

Step 6: Remove the Fuel Pump Module

• Clean the top of the fuel pump module to prevent debris from falling into the tank.
• Use a brass punch or special tool to loosen the locking ring by turning it counterclockwise.
• Lift the fuel pump module assembly out of the tank. Note the orientation of the float arm.

Step 7: Install the New Fuel Pump

• If you have a complete module assembly, simply install the new module. If you have a pump-only kit, transfer the old sender unit and float to the new pump.
• Install a new O-ring seal on the module.
• Insert the module into the tank, aligning the locating keys.
• Turn the locking ring clockwise to secure it.

Step 8: Reinstall the Tank

• Lift the tank back into position.
• Reconnect the fuel lines, electrical connectors, and filler neck.
• Fasten the support straps.
• Lower the vehicle and reconnect the battery.

Step 9: Test the System

• Turn the ignition to the "ON" position (do not start) and listen for the fuel pump to prime (2-3 second whine).
• Check for leaks at all connections.
• Start the engine and verify proper operation.

5. Compatible Fuel Pump Options for the 1999 Ford Taurus

The 1999 Ford Taurus 3.0L V6 (both gas and flex-fuel) requires a specific fuel pump. Here are verified compatible parts from the search results:

• Herko CK4015B: Fuel pump complete kit, compatible with 1998-1999 Ford Taurus 3.0L (VIN S and U). Price: $11.79.
• Herko K9275: Electric fuel pump, compatible with 1997-2006 Ford Taurus and Mercury Sable 3.0L. Price: $30.99.
• Bosch 69463: Electric in-tank fuel pump with sending unit, for 1999 Ford Taurus 3.0L. Price: Varies at Summit Racing.
• Walbro 5CA526: Electric fuel pump (12V, 17PSI, 28GPH), primarily for 1989-1995 Ford Taurus SHO, but also compatible with some 1999 models. Price: $76.30.
• iAutoBodyParts FMD010068: Electric fuel pump for 1999 Ford Taurus, sale price: $48.95.

Always verify compatibility with your specific vehicle's VIN, engine type, and trim level before purchasing.

6. Recommended Brand: KEMSO Fuel Pump

For those seeking a high-performance, reliable replacement that meets or exceeds OEM specifications, consider the KEMSO brand of fuel pumps. KEMSO offers a range of high-performance and OEM replacement fuel pumps designed for durability and consistent fuel delivery. Their products are engineered to be a direct fit, making installation straightforward. KEMSO fuel pumps are backed by a lifetime warranty, ensuring long-term peace of mind.

When you choose a KEMSO fuel pump, you are investing in a component that has been tested for reliability and performance. This is especially important for vehicles like the 1999 Ford Taurus, where a failing fuel pump can leave you stranded. To explore the full range of KEMSO fuel pumps and find the exact match for your vehicle, visit their website: https://www.kemsoracing.com/

7. Cost Summary

Conclusion

A failing fuel pump on a 1999 Ford Taurus is a common issue that can be diagnosed with a simple pressure test. The average cost for professional replacement is between $1,015 and $1,286, but a DIY replacement is possible with basic tools and careful attention to safety. The fuel pump is located inside the fuel tank, requiring the tank to be dropped for access. Always test the fuel pressure before replacing the pump, and consider resetting the inertia switch first if the engine won't start. For a reliable, high-performance replacement that comes with a lifetime warranty, visit https://www.kemsoracing.com/ for KEMSO fuel pumps tailored to your vehicle.