Introduction
This manual provides essential information for the proper installation, operation, and maintenance of your Carter Electric Fuel Pump 12V, Model P4070. Designed for passenger cars, fleet, industrial, and recreational vehicles, this pump delivers reliable fuel supply. Please read all instructions carefully before proceeding with installation or operation to ensure safety and optimal performance.
Safety Warning: Working with fuel systems involves flammable materials and high pressures. Always wear appropriate safety gear, ensure adequate ventilation, and disconnect the vehicle's battery before beginning any work. Consult a qualified mechanic if you are unsure about any step.
Setup and Installation
Before Installation
- Ensure the vehicle's ignition is off and the battery is disconnected.
- Relieve any pressure in the fuel system.
- Have appropriate tools, safety glasses, and gloves ready.
- Confirm the pump's specifications (12V, 6 psi maximum pressure, 72 gph free flow rate) are compatible with your vehicle's requirements.
Installation Steps
- Mounting the Pump: Select a mounting location at or near the bottom of the fuel tank, and never more than 24 inches above the tank. Use the provided mounting bracket and hardware to securely fasten the pump to a stable surface, such as the vehicle's frame rail. Ensure the pump is protected from road debris and heat sources.
- Fuel Line Connections: Connect the fuel lines to the pump's inlet and outlet ports. The pump features 1/4 inch NPT female threads for both inlet and outlet. An inlet filter is mandatory to prevent pump damage and is required for warranty validity. Use 3/8 inch fuel-rated hose for connections. Ensure all connections are tight and free of leaks.
- Electrical Wiring: Connect the pump to a 12V power source. Use 14 gauge wire and install a 10 amp fuse in the circuit. It is recommended to use an oil pressure cutoff switch or a pressure safety switch (e.g., A-68301) to shut off the pump when the engine stops, enhancing safety. The pump's electrical terminals are un-threaded studs; use the included proprietary push-on connectors with retaining clips.
- System Check: After installation, reconnect the battery. Turn the ignition to the 'ON' position (without starting the engine) to allow the pump to prime the system. Check for any fuel leaks and ensure all electrical connections are secure.
This image displays the Carter P4070 electric fuel pump along with its complete installation kit, including mounting bracket, electrical connectors, hose barbs, and various fasteners.
A detailed view of the Carter P4070 electric fuel pump, highlighting its robust metal construction and electrical terminals.
Operation
The Carter P4070 electric fuel pump is designed for continuous operation, providing a steady flow of fuel to the engine. It operates with leaded and unleaded gasoline, gasohol, and fuel boosters. The pump features an internal pressure-regulating valve, eliminating the need for an external regulator in many applications, especially those requiring low pressure.
- Noise Level: This pump may produce an audible operating sound. Using rubber hose to connect to vehicle lines can help dampen noise.
- Self-Priming: The pump is self-priming, meaning it can draw fuel from the tank without manual assistance once power is applied.
- Fuel Compatibility: Compatible with various fuel types, including gasoline and gasohol. Some users have reported success with diesel applications as a lift pump.
Maintenance
Regular maintenance ensures the longevity and optimal performance of your fuel pump.
- Fuel Filter: The use of an appropriate inlet fuel filter is critical. Regularly inspect and replace the fuel filter according to your vehicle's service schedule or if signs of clogging appear. The patented Clean Screen strainer offers enhanced dirt-holding capacity, but external filtration is still essential.
- Connections: Periodically check all fuel line connections for leaks and electrical connections for corrosion or looseness.
- Fuel Level: Avoid consistently running the fuel tank to empty, as the pump relies on fuel for cooling. Ideally, the pump should remain permanently filled with fuel to prevent internal oxidation.
Troubleshooting
Refer to the table below for common issues and their potential solutions.
| Problem | Possible Cause | Solution |
|---|---|---|
| Pump does not operate | No electrical power; Blown fuse; Loose wiring connection; Faulty relay/switch | Check fuse, wiring, and power supply to the pump. Ensure proper ground connection. Test relay/switch. |
| No fuel flow or low pressure | Clogged fuel filter; Kinked or restricted fuel line; Air leak in inlet line; Low fuel level; Faulty pump | Replace fuel filter. Inspect fuel lines for obstructions. Check for air leaks. Ensure adequate fuel in tank. Test pump operation. |
| Excessive noise from pump | Improper mounting; Air in fuel system; Restricted inlet; Worn pump components | Ensure pump is securely mounted with rubber isolators. Bleed air from system. Check inlet for restrictions. If noise persists, pump may be failing. |
| Fuel leaks | Loose connections; Damaged fuel lines; Incorrect fittings | Tighten all fuel line connections. Inspect fuel lines for cracks or damage and replace if necessary. Ensure correct NPT fittings are used. |
Technical Specifications
| Feature | Specification |
|---|---|
| Brand | Carter Fuel Systems |
| Model | P4070 |
| Voltage | 12 Volts |
| Maximum Pressure | 6 psi |
| Free Flow Rate | 72 gph (gallons per hour) |
| Inlet Connection Size | 0.25 Inches NPT |
| Outlet Connection Size | 0.25 Inches NPT |
| Body Material | Aluminum and Steel |
| Item Weight | 3.5 pounds (1.59 Kilograms) |
| Product Dimensions (L x W x H) | 6.5 x 4.7 x 4.7 inches |
| Fit Type | Vehicle Specific Fit |
| Operation Mode | Automatic |
Warranty Information
Carter Fuel Systems products are built to meet or exceed original equipment fit and reliability standards, undergoing 100% factory testing and approval. This commitment to quality ensures premium performance. For specific warranty terms and conditions, please refer to the documentation included with your purchase or visit the official Carter Fuel Systems website. Keep your proof of purchase for any warranty claims.
Customer Support
Should you encounter any issues not covered in this manual, or require further assistance, please contact Carter Fuel Systems customer support. You can typically find contact information on the product packaging or by visiting the official Carter Fuel Systems website. When contacting support, please have your product model number (P4070) and purchase details readily available.
