Fuel Vapor Ldp Probs

Has N E One Had Any Issues With Their Fuel Vapor Leak Detection Pump? I Got A Code Saying Its A "evap Ldp".....if N E One Has Info On A Fix For A 99 Cherokee Shutting Of Instantly While Driving And Having To Wait For It To Start Up Again Just To Have It Happen Again, Would Greatly Be Appreciated. Thanx. This Problem Is Starting To Create Issues With Getting To And From Work.