it first went from warm to cold then to warm over like a 30 min span. now it went from normal to hot. luckily on the hot one i was 300 ft from my house. and it did it in 5 seconds. i was thinking the thermostat? i dont know where it is or how difficult the job is. the car has 62k on it...its a 93 tsi awd with an mbc set at 14 psi and a modded maf which i did today.... and a k & n..thanx