Question

Fuel filter replacement is being discussed. Technician A states that the first step in fuel filter replacement is

to drain the fuel tank completely. Technician B states that a scan tool may be required to relieve fuel
pressure before service on GDI engines. Who is correct?
Select one:
Oa. Technician A only
O b. Technician B only
O c. Both Technicians A and B
O d. Neither Technician A nor B

Answer 1

The correct answer is: b. Technician B only.

Technician B is correct that a scan tool may be required to relieve fuel pressure before service on Gasoline Direct Injection (GDI) engines. GDI engines operate at a higher fuel pressure than traditional fuel injection systems, and therefore, the fuel system must be depressurized before the fuel filter is replaced. Technician A is incorrect as draining the fuel tank is not typically necessary for fuel filter replacement.