I have a new issue with my Jeep. Yesterday, while I was stopped at a traffic light, my engine suddenly shut off. I had to roll off to the side of the road, which was a pain in the *** since the power steering wasn't working. It started right back up and ran pretty crappy afterward, stuttering and slight bucking, but no more stalling. I also noticed that when I was doing highway speed on the way home, my RMP needle was jerking slightly. Then today my husband took it to work and after about 20 minutes he said it started stuttering and almost stalled out on him. The check engine light came on for a second then when off again, but the Jeep didn't stall out.
Here are the facts:
I have a 94 Grand Cherokee Laredo with a 4.0 6L. engine. I've recently replaced the starter and last year replaced the thermostat.
Yesterday the heat worked but wasn't as hot as it normally gets. It wasn't until I had driven over 11 miles that the heat actually got hot.
When I had the Jeep parked and running for about five minutes after driving 11 miles, the engine temp shot up over 200. As soon as I began driving, the temp lowered to normal.
Also, it has been extremely cold here the past two days with lows at night of about 5 and with the highs being in the mid teens during the day and wind chills in the negatives.
I park in an unheated garage at night and during the day it's parked in the full sun. Could this be an issue with my anti-freeze? Also, could this be an issue with water in my gas tank? Or could this be a sensor or filter problem?
Thanks for any input!