I live in BC, canada and just had an aircare test done to my care which is a 1995 pontiac sunfire. The results came back that I have high hydrocarbon and carbon monoxide outputs. I have also noticed recently that my engine tempurature will remain constant in the middle of the thermostat while driving but if I am stopped for a period of time the temp gauge will rapidly increase to just under the yellow point then decrease and repeat. is there any solutions you can think of and is it possible to give an estimate on how much you think it will cost to fix.