Question

technician a says that low vacuum at idle could be caused by a restricted air filter. technician b says that a restricted exhaust could cause a low vacuum reading at 2500 rpm. who is correct? select one: a. technician a b. technician b c. both a and b d. neither a nor b

Explanation:

• A restricted air filter reduces the amount of air entering the engine at idle, which can lead to low vacuum as the engine has to work harder to draw in air.
• A restricted exhaust causes back - pressure. At higher engine speeds (like 2500 rpm), the engine's exhaust flow is more significant. The back - pressure from a restricted exhaust disrupts the normal engine operation, resulting in a low vacuum reading.

Answer:

C. Both A and B