hey all i have a question. my parents own a 01 durango and was my first vehicle that i was legally allowed to drive hehe. since ive gotten my truck my brother has started driving and he ended up hitting the tree in our driveway and doing sum damage to the bumper... 2,000 dollars later and renting a 2010 ram we get it back.. i notice when i went to pick it up it was very low on gas and im not sure how much was in it when it left because i was away that day. I take it down to put gas in it i noticed when i stop it idled very ruff so i though gas sat to long it was in the shop for about a month and wasnt run much from what i was told so i put 91 in it to maybe help clean it up just incase... it kinda ran better but still kinda idled ruff. now i know when at WOT the cat ticks it always has since we've had it. any suggestions? im know the head gaskets are need for change soon but im leaning towards the cat? any suggestions be appreciated.

 

Check fuel pressure.