l have seat cordoba 2001 model,1.6 engine...when l am on signal light then l start moving my car use to move very slowly like there is no pickup in the car but after l push full race then its become ok......so thatmeans there is no pickup..i already change the plug can any one tell me wut more ii can do?

Go straight to a garage. That is a bizarre problem for a newish engine, and l would assume damaged electrics, although it could be any number of things - if it is jerky, it could be fueling.are any warning ligts on?
You may be doing irreversible damage hammering the pedal to the floor just to get the car moving, so l really would get that checked into ASAP.