I have a 99 chev cavalier with the 4cly.My daughter was driving it 3 weeks ago and the temp gage woud go to cold and back up to normal.The motor was missing and got worse the further she went.This all happened on interstate hwy running 70 mph and continues till it cools.The next time it started this the transmission quit pulling.
I had trans rebuilt and she drove it agn it started the same thing again.I had it towed to the garage of course it won't miss and shows no codes.Does anyone have any idea what the problem is? Car has 88,000 miles on it.

 

It would help to have the subject say something about your problem. Not your name.