Author Question: A vehicle fails an emission test due to excessive carbon monoxide indicating a rich air fuel ... (Read 131 times)

cookcarl · **on:** Jun 23, 2018

A vehicle fails an emission test due to excessive carbon monoxide indicating a rich air fuel mixture.
Technician A says that a saturated charcoal canister could be the cause. Technician B says that a stuck-closed EVAP purge solenoid could be the cause. Which technician is correct?

A) Technician A only B) Technician B only
C) Both technicians A and B D) Neither technician A nor B

Question 2

Which statement is correct?

A) Dirt is most likely to be found near the bottom of the fuel tank.
B) Throttle body injectors inject fuel below the throttle plate.
C) Dirt is most likely to float on top of the fuel.
D) Port fuel injectors inject fuel above the throttle plate.