I have a camry 92 (135k miles). Recently, my car sometimes just stall whenever I have to come to a stop (Red light, stop sign...etc). 19 out of 20 times, its fine. The RPM needle just stays on 1 or little below 1. But that 1 out of 20 times that it stalls, the RPM needle slowly goes to 0 and engine turns off. I took the car to mechanic, he said because its random, there's no specific reason, so he did tune-up (replaced plugs and wires, took $200). The problem still exists. Does anyone know why it may happen or what to do about it ? Thanks.