Low motor power

Greetings to everyone
I have a 98 escort with 2 -liter engine of 8 valves, repair the machine and everything is in standard measures, however it has no power when accelerating in climbs the rpm is lowered to the degree that desired, someone can give me a tip

that it

could be the
cause

Hello Halcon 4, I do not know what you mean with "repair the machine", the thing is in itself the compression of cylinders to start (if you reviewed valve seats, you changed segments, etc.) Then there is the correct synchronism of the distribution, followed, that there are no air intakes in the admission and that the pressure of gasoline walks on the 2.7 bar. And also, that the catalyst is not emptied, neither you carry filters or escapes "sports" nor things like that. Check to see if you have any of these things that are not common. Greetings!!