* Bad spark plug wires or distributor cap: These can cause the engine to misfire and lose power.
* Weak fuel pump: This can cause the engine to starve for fuel and lose power.
* Bad oxygen sensor: This can cause the engine to run rich and lose power.
* Catalytic converter: If it is clogged it can create too much back pressure and restrict exhaust gas flow, reducing engine power.
* Transmission problems: If the transmission is slipping or not shifting properly, this can cause the car to lose power going up hills.
