NHTSA Complaint #11470642 — 2017 JEEP GRAND CHEROKEE

Driving down highway at 75 then the warning light for the start/stop function lights up, the jeep then starts cutting out and sounding really rough, speed immediately drops down to the 40"s this is on a major roadway luckily there were no cars behind me because they probably would had ran into me due to speed dropping that quickly thought I had a flat due to the sound pulled over as quickly as I could got out checked everything did not see anything wrong no fluid leaking, no smoke ect..get back in the vehicle go to proceed to get back up on the road and the vehicle is running really rough and jerky will not go above 40 engine light then comes on along with warning bells, pull back over on side of road turn vehicle off let it set for about 5 min. then start back up engine light is off but the start/stop light on dash is still on, then the engine light comes back on right outside of town slowly get into town take immediately to mechanic shop he checks the engine and tells me that cylinder 5 is misfiring changes coil pack and problem still shows up, I get the vehicle towed by to my home town 3 hrs away take to dealership now they tell me that my cylinder 5 has no compression and I need new engine the vehicle only has 81000 miles just purchased last July .