Question

While discussing injector cleaning, Technician A says the fuel return line must be blocked during the injector-cleaning process on some vehicles.

Technician B says the electric fuel pump must be disabled during the injector-cleaning process.
Who is correct?
a. Technician A
b. Technician B
c. Both A and B
d. Neither A nor B

Answer 1

Both Technician A and Technician B are correct; the fuel return line must be blocked and the electric fuel pump must be disabled during the injector-cleaning process. Option C is correct.

Step-by-step explanation:

When discussing injector cleaning, it is true that for certain vehicle systems, the fuel return line may need to be blocked to correctly perform the cleanup process. So, Technician A is correct in stating that the fuel return line must be blocked during the injector-cleaning process on some vehicles. This is to ensure that the cleaning solvent used during the process flows through the injectors properly and does not return to the fuel tank.

Technician B is correct in saying that the electric fuel pump must be disabled during the injector-cleaning process. This is typically done to prevent the fuel pump from interfering with the cleaning process, either by introducing fuel into the system which could dilute the cleaning solution or by being potentially damaged by the cleaner itself. Therefore, Technician B's statement is also accurate.

Given this information, the correct answer to the question is c. Both A and B.