I live in Coarsegold Ca and it is raining. My 91, 5. 9 has been sitting for awhile. I decided to start it up and idle for a minute and the "Water in fuel" light came on. On the bottom of my fuel filter I have to push up to drain the water or so it says. I did this then started my truck and the light is still on. I've done the about 4-5 times now and the light is still on. It runs good but I don't know what else to do. Any suggestions?