[mab6680]

I have a 2000 xls 4 door 4wd 4.0l ohv ok the problem I'm having is if I park on an incline like my driveway all of my washer fluid just pours out of the washer fluid nozzle on the rear wiper arm I have changed the pump twice once because it crapped out and once to see if that was why the fluid was pouring out of the nozzle is there a check valve what keeps gravity from pushing the fluid out if left on an incline