the car had a broken exhaust for the longest time and i welded it back up changed the air filter runs cold air. The car is now boggy and has no power till hire rpms like 4k+ if was boggy before i put all that stuff on. air is loud to. i think it might be temp sensor but not sure because its not very good on gas either. car has 1662xx miles on it. if anyone has any ideas let me know.