my iroc slowly but steadilly rises in temp,while parked and on the highway? the air dam is there, i just installed a new water pump,thermostat is about 1.5ish years old with not alot of miles on it, hoses are in good shape, fan is relayed through a toggle(single fan).my radiator looks to have a hole that was welded before i got the car, its about 2" up from the bottom.whats normal operating temps? when the gauge showed 220-260 i installed a equus temp gauge and it still lingers around 200-220. when i click the fan on it wont cool?and since i went from a lb9 to a tpi 350 fuel mileage seems have been cut in half?