I have a 96 T/C Van with 137,000 miles and a V6 me and my wife and kids went to Ohio over the weekend and on the way back it just stopped running on the interstate.before I Had a upstream o2 sensor replaced by the crysler dealership and they said they ran a diag.test on it said everything is fine .But after it just quit yesterday I had it pulled to a mech. In Ky and they put it on a diag. tester and a big list of things came up.I 've already paid over $12,000 on it having a new comp. chip put in and the sensor replaced.My question is should I take it back to the dealership I got it from and ask for a different car or take it back to chrysler and demand that they do it right and have them fix it again.