There's literally 100s of causes for lack of power,
What normally happen on forums is someone says what it was on their car, the original poster changes that part it either fixs it or doesn't, then the cycle repeats
Assuming it's a petrol
Anything to do with the
Ignition
Fuel
Air
Compression
Timing
Throttle pedal
Allong with associated sensors
It's better to try and diagnose the problem than taking the scatter gun approach
Read the code would be first, hopefully it will come back with something useful not a generic misfire code
Post a photo of all 4 spark plugs in order some times helps
I normally start by pulling the MAP sensor, they often get covered in oil, it's only one bolt and free
What normally happen on forums is someone says what it was on their car, the original poster changes that part it either fixs it or doesn't, then the cycle repeats
Assuming it's a petrol
Anything to do with the
Ignition
Fuel
Air
Compression
Timing
Throttle pedal
Allong with associated sensors
It's better to try and diagnose the problem than taking the scatter gun approach
Read the code would be first, hopefully it will come back with something useful not a generic misfire code
Post a photo of all 4 spark plugs in order some times helps
I normally start by pulling the MAP sensor, they often get covered in oil, it's only one bolt and free