Order Ford Ranger Pickup Evap Emission System & Ford Ranger Pickup Evap System Components Replace Ford Ranger Pickup Evap Emission System Leak. Maintaining your Ford Ranger Pickup's Evap (Evaporative Emission Control System) is crucial to prevent harmful vapors from escaping into the atmosphere and affecting performance. Regularly check for cracks or loose connections in the system and replace the gas cap if it shows signs of wear, as these are common indicators that your Evap may need attention. When selecting a replacement, opt for a durable, high-quality canister that aligns with your Ranger's specifications—options range from standard to advanced carbon-lined models for enhanced vapor absorption. Proper installation is key, so ensure all hoses are securely fastened and free from obstructions. With these guidelines, you'll extend the lifespan of your Evap system and contribute to a greener, more efficient ride.