Purchased used engine online! Was told it was compression tested! Would not start unless plugged in and cranked about twenty times. After warming up would start faster but ran ruff with abnormal noise.changed or rebuilt all external parts and sensors . Replace fuel injectors.casing on timing cover broke where oil cooler bolts on front of engine. Pulled engine again to repair cover. Finally got it back in to do a compression test, and found #2 and #3 low 190 and 230 the rest around 300. Finally pulled again to rebuild. Below minimum compression problem from start. I have only driven it 60 miles since used engine install . Lesson learned!