I just had a new 2.5L engine installed in my jeep cause the last one blow up. Everything was fine until the new engine was installed now after engine gets warm ill be running down the road and it will just cut out. I let off the gas and push gas it takes back off. Took back to dealer and they said it was crank shaft sensor. Replaced that and still doing it. Dealer dont know whats wrong. PLEaSE HELP!!!!