hello i was having trouble with my honda

this is what is wrong with it

I started it up oneday without a problem
then i started driving
i noticed i couldn't drive faster than 35kms/h
i tried to floor it, same thing
I still couldn't drive 35kms
I tried shutting it off and starting it again
same thing so i let it cool off
tried it again same thing
it like it has no power

every now and then it would want to backfire
could be a clogged catalytic converter?

i changed the main fuel relay and the fuel filter and air filter
anybody know why its going like this?

 

Is it giving any codes. Any recent work done to the car.

 

It sounds like your computer is in limp mode - a safety feature of the computer to protect the engine from damaging itself

I recommend bringing your car to an auto parts store to have them read the codes for you then post the results here.