The EONV (engine off natural vacuum) test is being discussed. Technician A says that to perform it, the ECM is kept powered for up to 4 minutes after the ignition switch is turned off. Technician B says that the natural vacuum created in the fuel tank as the engine cools, is from about 3 inches to about 5 inches of water. Who is correct?
A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B

Question

The EONV (engine off natural vacuum) test is being discussed. Technician A says that to perform it, the ECM is kept powered for up to 4 minutes after the ignition switch is turned off. Technician B says that the natural vacuum created in the fuel tank as the engine cools, is from about 3 inches to about 5 inches of water.  Who is correct?
A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B

Quizplus · Accepted Answer

The Answer of The EONV (engine off natural vacuum) test is being discussed. Technician A says that to perform it, the ECM is kept powered for up to 4 minutes after the ignition switch is turned off. Technician B says that the natural vacuum created in the fuel tank as the engine cools, is from about 3 inches to about 5 inches of water.  Who is correct?
A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B

The EONV (Engine Off Natural Vacuum) Test Is Being Discussed