My wife's 95 v6 has started to run hot,after about 20 miles on the freeway the temp gauge is at the L on the gauge.Sun day I replaced the thermostat with a 180,checked the water pump and flushed the system,still runs hotter then it should.THe fans come on when the temp. reaches the L on the gauge,also runs on A/C and deforst.Any Ideas,are the fans coming on to late?