Ford Ranger Maintaince And Repair Manual page 526

Fuel Vapor Canister
Generally, the only testing done to the vapor canister is a visual inspection. Look the canister over and replace
it with a new one if there is any evidence of cracks or other damage.
Do not try to check the fuel saturation of the canister by weighing it or by the intensity of the fuel odor
from the canister. These methods are unreliable and inhaling gasoline fumes can be toxic.
CANP Solenoid
1441−1444 MODELS
1. Remove the CANP solenoid.
2. Using an external voltage source, apply 4−14 DC volts to the CANP solenoid electrical terminals.
Then, use a hand−held vacuum pump and apply 16 in. Hg (13 kPa) vacuum to the manifold side
nipple of the CANP solenoid.
1. If the solenoid opens and allows air to freely pass through it, the solenoid is working properly.
522
HOW TO USE THIS BOOK
EVAP hose routing on the 1.0L engine
Click to enlarge
COMPONENT TESTING