1. It has no power because of low fuel pressure and therefore less delivery of fuel, test the pressure.
2. The valve timing is out, it also can be looked at by removing the front timing belt covers.
3. There may be fault codes stored which can help you determine the correct direction for repairs.
All 3 tests require information, and tools, a scanner, a fuel gauge, and code information. They have all of this at this site's store and code tables. Ok, sir
the catalytic converter may be clogged also, a vacuum, fuel pressure gauge can be used for testing it. Or sometimes you can feel it with your hand.