98 Pathfinder struggled to start, idled normal then rough and back to normal.

What is your question?

Tried 3 times to start normally but engine would turn over a bit then stop. 4th time I pumped the gas and it turned longer but didn't start until 5th time. Idle was normal for about five minutes then was very rough for a few more minutes before getting back to normal. Exhaust smelled like burned rubber. Drove 15 miles perfectly and then the idle got extremely low downhill for about a mile and back to normal again. Pathfinder was cold at initial start after driving for over 20 miles it was very hot to the touch on driver side hood and fender and started again without an issue.