I had a friend of mine borrow my truck for a day and it overheated on him while driving around town. He said he pulled over right away and shut it off but i dont know that for sure. The coolant was low, filled it and still was running hot. I then flushed the system and put block seal in the radiator. stopped overheating but the truck has no power. I checked the spark plugs and the passengerside coils and be unplugged and the engine runs the same like its only running on the driverside cylinders. Then i did a compression test and everything cylinder had good compression. Does anyone know or have had the same problem. The truck runs and will drive but has a rough idle and shakes. Could the injectors be bad?