1999 Jeep Laredo Engine problems

Jeep shuts down while driving at any speed. Will shut down/stall and may start back up or might be 10 minutes or two hours or the next day before it will start again. Stalling has gotten progressively more frequently. I have almost been rear ended twice when it stalls. Been to several mechanics and no one has been able to correct problem. *Tr

I was driving on the highway and all of a sudden I herd a loud noise and before I knew it my truck was filled with smoke and I couldnt see out the wind shield I had to hurry up and get to the side by the guard rail while struggling to see, and I had my kids in the car with me .I had to have it towed to my house my mechanic came to check it and discovered a big hole and when he took the engine out he said you could tell it was there already and the dealership had to patch it up before they sold it to me because it was to perfect and I only had the truck for 1 year. *Tr

While driving on the interstate and preparing to exit, vehicle would not slow down or decelerate. I tried to apply the brakes in attempt to stop.Shifted into neutral in order to gain control.Rpm's immediatly shot up to 3000 and fluctuated between 3000 - 4000.Pulling to the side and looking under the hood to see if there was any obstruction in the accelerator linkage,there was not.I attempted to start the vehicle again 3 times with the same results.I let the vehicle cool for 1/2 hour ( temperature was in proper...

Have had brakes on this vehicle worked on 7 times since purchased new. Only has approximately 70k miles. All seemed to be the result of warped rotors. Latest incident check engine light went on, had head gasket replaced, serpentine belt replaced and t-stat. *Jb