Vehicle Trouble - Of All Times

Yup...the 4 Runner goes on the blink yesterday afternoon. After turning out of the driveway, the engine started sputtering and backfiring with a severe loss of power.  What could it be...??? water in gas, clogged fuel pump, bad plugs, carbon build up??? I maintain it properly but it is a '99 and has 175K + miles on it. Of course it happened when all the shops are closed for the weekend.  Saturday is the Youth Deer Hunt and my grandson is primed to kill his first...we've got to get there.Wish me luck with the vehicle.