One fuel pump.
The 1986 Ford F-150’s fuel-pump configuration depends on the engine and whether the truck used carburetion or electronic fuel injection. In general, these trucks use a single pump, with the location and type varying by setup.
Fuel-pump configurations in the 1986 F-150
In the 1986 model year, Ford offered two primary fuel-delivery arrangements for the F-150. The following overview explains each setup and what to look for.
- Carbureted engines — a single mechanical fuel pump mounted on the engine block, driven by the camshaft, delivering fuel directly to the carburetor.
- Electronic fuel injection (EFI) engines — a single electric fuel pump located in the fuel tank, supplying pressurized fuel to the system via the fuel lines and regulator. The overall count of pumps remains one in these EFI configurations.
Regardless of configuration, the truck uses a single fuel pump. If you’re troubleshooting, identify whether your engine is carbureted or EFI to determine the pump’s location and the appropriate diagnostic steps.
How to identify which fuel-pump setup your 1986 F-150 has
To determine the exact configuration on your vehicle, inspect for a mechanical pump attached to the engine block (indicative of a carbureted setup) or look under the vehicle for an electric pump module in the fuel tank (indicative of EFI). Engine codes and VIN documentation from that model year can also clarify which system your truck uses.
Maintenance and troubleshooting tips
Regularly inspect fuel lines and connections, and verify fuel-pressure when diagnosing performance issues. For carbureted engines, check the pump’s linkage and cam timing; for EFI engines, inspect the tank pump wiring, ground, and fuel-pressure regulator to ensure proper operation.
Summary
The 1986 Ford F-150 typically uses a single fuel pump, with the exact type and location depending on whether the engine is carbureted (mechanical pump on the engine) or EFI (electric pump in the fuel tank). This single-pump design is consistent across configurations, with differences primarily in placement and operation rather than overall count.