Hello everyone. My 2005 liberty 3.7 has 280k on it and the engine had a loss of power and popping thru the intake so I found a wrecked 2005 donor jeep and swapped out the engines and the donor ran like a top so I put it in and it runs the same way! I used all the same sensors, coils, injectors and intake from the donor and it runs the same way! I checked out the wiring harness and grounds and they're all good. I even got another pcm and that didn't make a difference! It doesn't throw a check engine light either! Anyone have any ideas?