My daughter has a 1993 toyota tercel, mileage is 134,000, it is a 4 cylinder, in line, 4 cycle. After driving a few minutes, when she comes to a stop, or slows way down, it will idle real low, and stall. It'll crank but will not fire until 5 or 10 minutes have elapsed. We changed the plugs, plug wires, and distributor. Any ideas? Thanks much.