| In-tank pump or module | Many modern gasoline vehicles; often supplied as a module with a strainer and, depending on the vehicle, a sender or regulator. | Varies by fuel system; port-injection systems commonly operate around 30–80 psi. | Fuel helps cool the pump, and in-tank placement can reduce noise and vapor-related issues. | Check fitment, electrical connector, module contents, pressure, flow, and compatibility with the vehicle’s fuel and control system. |
| External inline pump | Replacement or supplementary supply on vehicles designed for an external pump; also used in some custom fuel systems. | Model-dependent; select to match the system’s required pressure and flow. | Accessible for installation and service without removing the fuel tank. | Confirm the pump is designed for its mounting location and fuel type. Follow manufacturer guidance for inlet supply, filtration, wiring, and heat protection. |
| Low-pressure electric pump | Carbureted gasoline systems and other applications specifically designed for low-pressure fuel delivery. | Often around 4–7 psi for carburetor applications; verify the engine and carburetor requirements. | Can provide suitable delivery for systems that do not require injection-level pressure. | Do not substitute for a higher-pressure injection pump. Check whether a regulator is required and use one compatible with the system. |
| High-pressure port-injection pump | Gasoline port fuel injection, where fuel is delivered to the intake ports rather than directly into the combustion chambers. | Commonly around 30–80 psi, with exact requirements varying by vehicle and operating conditions. | Designed to supply the pressure and flow needed by compatible port-injection systems. | Match the original system specification, electrical control strategy, and required flow at operating pressure—not just the pump’s free-flow rating. |
| Electric diesel lift or transfer pump | Moves diesel from the tank toward the engine’s fuel-filter and injection system; the layout differs by vehicle. | Vehicle-dependent; some low-pressure supply systems operate in the single-digit to tens-of-psi range. | Can supply fuel to the engine-side system and may assist priming, depending on the design. | A lift pump is not the high-pressure injection pump. Verify diesel compatibility, pressure, flow, filtration, and the vehicle’s priming requirements. |
| Brushless electric pump | Available in some in-tank and external designs for vehicles or custom systems requiring a compatible brushless setup. | Depends on the specific pump and system; there is no single pressure range for brushless designs. | Brushless motors avoid the sliding electrical brushes used in brushed motors and can support electronic speed control in compatible systems. | Check controller requirements, wiring, vehicle compatibility, fuel compatibility, and manufacturer-rated pressure and flow. |