What controls the electric air pump in a secondary air injection system?
A) A belt B) The PCV valve solenoid
C) A switch under the hood D) The PCM
Question 2
When testing an EGR (Exhaust Gas Recirculation) system for proper operation using a vacuum gauge, how much should the manifold vacuum drop in inches of Mercury (Hg), when the EGR is commanded on by a scan tool?
A) 1-2 B) 8-10 C) 3-5 D) 6-8