dellstopjeep
NAXJA Forum User
- Location
- KUNA, ID
when i bought my 1991 xj with the 4.0 i was told it had a 180 thermostat. it ran at about 160 and never over 170 to 175. i replaced my coolant sensor when i failed but then it was fine. then after being told my gas mileage is crap because im not gettin proper fuel mixture due to temperature and heater not bein as hot as i like i decided to throw in a factory thermostat. the install went fine and now i am runnin at 140 and no hotter than 155. im stumped! jeep runs fine just not hot enough! and i air in cab is a bit cooler, still warm just not obviouslywhat it should be. any ideas?????