My car overheats terribly in traffic everytime. I have a four row radiator, 160 degree mr. gasket therm., 16 inch flex fan w/shroud, highflow waterpump,catchcan,10ilb cap. and a good mixture of water/coolant. I have a crummy stock electric guage out of a firebird, it starts at 100 the middle is at210 and redzone is 260. It runs in the middle of 100-210 which i figure is about 165 all day perfectly, but as soon as I sit in traffic it starts to rise, after a bit it gets up to about 220-230 at the worst!!! But is seems to run Okay(not great though) I had a 16inch electric fan pushing from the front of the radiator, but the motor went dead so i took it off. Is this guage likely faulty or do I have a problem! any Ideas??