Exam 29: Fuel Delivery Systems

Which of the following is a typical fuel filter replacement interval?

A scan tool can be used to turn on the fuel pump when the engine is not running.

All modern fuel tanks can only be filled to 90 percent of their capacity.

A restricted fuel filter will cause ____________________ than normal fuel pressure.

During its evaporative system integrity test, the canister vent solenoid is open to vent the entire evaporative system.

OBDII evaporative system integrity testing is being discussed. Technician A says the integrity check is done by creating a vacuum in the tank and measuring how well it holds the vacuum. Technician B says the fuel tank pressure (FTP)sensor is a transducer that converts the absolute pressure in the fuel tank into an input for the PCM. Who is correct?

Copper tubing can be used to replace steel tubing for fuel lines.

Name the two types of threaded fuel line fittings.

A no start/no fuel pressure condition is being diagnosed. When a test light is connected to the pump positive terminal, there is no voltage when the engine is cranked by the starter. What could cause this problem?

In what direction must the arrow printed on a fuel filter face?

Gas cap testing is being discussed. Technician A says the tester applies twenty inches of vacuum to the cap and measures its rate of leakage. Technician B says if the wrong adapter was used, the cap will fail the test even if it is good. Who is correct?

Most current fuel pumps are installed inside the fuel tank.

The fuel pump check valve is normally located in the fuel rail.

Fuel pumps should be tested for ____________________ and ____________________.

On a modern common rail diesel (DI)direct injection system fuel pressure is typically ______ psi.

Technician A says the inertia switch has a reset button that must be depressed for at least one second before the pump will operate again. Technician B says the inertia switch is triggered by the ABS control module. Who is correct?

Technician A says the gas cap is equipped with a pressure release valve that opens if there is excess vapor pressure in the fuel tank. This prevents tank ballooning. Technician B says the gas cap is equipped with a vacuum relief valve that opens if there is an excessive amount of vacuum in the fuel tank. This prevents tank collapse. Who is correct?

Fuel lines are being discussed. Technician A says when installing flexible tubing, always use new clamps. Technician B says ordinary rubber hose may be used to replace a kinked steel fuel line. Who is correct?

What controls [turns on and off] the fuel pump on most late-model vehicles?

All fuel tanks have a liquid vapor separator.