I was given a 2005 ram 1500 hemi. But they said it needs an engine.150,000 miles

What is your question?

It will start an run as long as foot is on gas. It has a loud and sometimes not so loud tick on passenger side of engine. It runs very rough, check engine lights for running to rich are on. Mechanic changed the sensor temperature in airflow to no help. All help with this is greatly appreciated.