i just been adding water to the car since i got it so i suppose i should go flush it and fill it up with proper coolant. also where is the thermostat located? easy to replace?

and about the throttle linkage, i pop the hood and played with the pedal and there is almost no play in it. it almost seems like the car is in a higher gear than it suppose to be.

and now it idles a lil low. a tick above 5. and if i am correct it should be between 5-10 (800rpm). i have ran a can of diesel purge and change everything when i got it 2 month ago too.