Power loss

Change the engine of a renault 21 with 2.2 engine in a 2 liters with carburetor but remove the carburetor and install the injection system but the still car accelerates normal but when starting or climbing it becomes slow to the point of not climbing or first march
that will happen?

I do not see so simple "parts exchange" that you carry from 2.2 to a 2.0, you have to know if you changed the gasoline pump or it is worth what you had, if it maintains the same pressure and flow for injection; Then this that the butt supposes that it will be different in terms of valves and camshaft and the theme of ignition ... has no strength because the same is missing or left over of gasoline ... Quitalo the spark plugs to see if they leave white, or soaked with gasoline, look to see. Greetings!!