99 Pathfinder dul fuel stopping while driving
 

I have a 99 Pathfinder that runs on duel fuel. Recently while driving on LPG gas the car just stopped with no warning and now does this on a regular basis however its restarts immediately. I have had the electrics checked and no electrical problem was detected. This hasn’t happened while I’ve been driving on petrol. I’m guessing that this may be a problem with the LPG gas system? Prior to this the Pathfinder didn’t idle smoothly either. What would be the cause of the car just stopping all of a sudden?