Exam 29: Fuel Delivery Systems

Residual fuel pressure is being discussed. Technician A says remove the fuel filter hose and apply compressed air to the fuel line to push the residual fuel back into the fuel tank. Technician B says to relieve the residual pressure by connecting a fuel gauge with a bleed valve to the Shrader valve. Who is correct?

All current gasoline fuel tank filler tubes have a built-in restrictor that prevents the entry of the larger leaded fuel delivery nozzle at gas pumps.

On a GM vehicle, a defective fuel pump relay will prevent the engine from running.

Name the two types of threaded fuel line fittings.

The fuel pressure regulator on a returnless fuel system is located ______.

Why are most fuel pumps in modern vehicles located inside the fuel tank?

The fuel strainer serves as a filter, stopping any rust or dirt that may be in the fuel from entering into the fuel pump.

When a vehicle will not start because of no fuel delivery, the first check should be the ____________________.

The fuel filter on a modern car is typically mounted ______.

Technician A says on some vehicles the fuel pressure is monitored by a fuel rail pressure sensor and the output of the fuel pump is controlled by the PCM through pulse-width modulation. Technician B says all fuel pumps on late-model vehicles are controlled by the PCM according to inputs received on the CAN bus and other specific sensors.Who is correct?

Most current fuel pumps are installed inside the fuel tank.

The negative battery cable should be disconnected before working on the fuel system.

On many vehicles, the ____________________ must be removed to replace the fuel pump.

Technician A says low fuel pressure can be caused by a restricted fuel filter. Technician B says low fuel pressure can be caused by a kinked fuel return line. Who is correct?