Crown Vic coolent system.

[argentfox]

I have a '98 Ford Crown Vic. I recently moved to Tucson Az. During the summer months when the temp goes above 100 deg., in stop and go traffic, the coolent heats up such that I need to turn off the AC in order for the temperature to drop. If I don't The AC drops out itself. I changed the thermostat, and checked to see that the fan turns on when I turn the AC on. I had the coolent system flushed in Oct. of 2003. Any sugestions as to what the problem is?
Also, about a month ago I noticed that the steering started to get sluggish. The tire pressure is 30 psi ( What is the recommended pressure for a crown vic?) I checed the PS pump resiviour. Again, there seems to be a temperture related problem. I noticed that at night when it cools down the steering improves. Any comments, as to what I should look at. Thank you, Argentfox.

[cobradude360]

iwould try putting in a lower temp thermostat and as for air pressure it chould be between 32 and 35 depending on prefernce

[way2old]

Check the cooling fans to be sure they work on both speeds. This is a 2 speed fan system. Tire pressures are dependant upon the style and size tire you have. Each of my techs has a different tire pressure for the vehicles they work on. Generally the maximum pressure is for a fully loaded vehicle. Most times there is not that much weight in car. So anywhere from 28 to 35 will be OK. 28 for a softer ride, 35 for a more firm feel.