Engine Mechanical problem
2001 Hyundai Sonata 4 cyl Automatic 84,000 miles
In about August of this year my car's thermostat has been sticking on cold for maybe 5 minutes (maybe less) and when the thermostat is stuck the car seems to be unable to change gears correctly. It's jerky and hard to control.
However, after a few minutes the gauge will go to it's proper place and the car acts fine!
I JUST got the thermostat replaced today hoping that was the problem but sadly, it's still doing this.
Could there be a vacuum leak?