My 93 Mitsubishi Expo runs good until I get stuck in traffic. Then it has a tendency to overheat especially in extended stop and go traffic. I checked the water and anti-freeze and it's okay.
Any ideas anyone?
Thanks.

So it seems to me that if you drive at a constant (higher) speed, you get air blowing over your radiator, cooling your temperature enough for your car not to overheat. But if you do not help the air flowing over your radiator by moving fast, your car overheats. It makes me believe there's something wrong with your radiator fan. Make sure it gets turned on when you drive the car. Perhaps drive it around somewhere and from time to time go out and listen if your fan is working. If it's not - you got to have it fixed. If it does - I have no idea :)

Thank you so much. I will checkit out. Again, Thanks.