we just take the car in have a new Thermostat replace.. after that the car seem to run much stronger.... the boot gauge now when I stepping on it go all the way to the yellow... never done this before at the same time the red light come on..


what is wrong ??? incorrect thermostat ??? on flat car run fine without any over heat problem when go up hill gauge show engine/radiator getting hot...

could it be a bad or diffected thermo sensor ??? the one screw on to the engine side look like a spark pluge ??

where should I start to check..

Thanks for all your input...