Technician A says that canister purging occurs during wide open throttle conditions. Technician B says that canister purging uses intake manifold vacuum to pull fuel vapors from the canister. Which technician is correct?

Question

Quizplus · Accepted Answer

Technician B is correct because canister purging indeed uses intake manifold vacuum to draw the fuel vapors stored in the charcoal canister into the engine for combustion. Technician A is incorrect because canister purging typically does not occur during wide open throttle conditions; it is more common during normal driving conditions when the engine can efficiently burn the additional fuel vapor.

Technician a Says That Canister Purging Occurs During Wide Open