Basicly cut a long story short, Bought lupo with a bad engine , put a new engine in with only 30k onit, started her up and from cold it didn't want to idle so u have to keep the revs up and after a few mins itl idle on its own , So I cleaned the tb, and had it reset/realigned and still had problems, so replaced the sensor thats on the side of the inlet manifold, oil pressure sensor was changed because I broke the last one , also cleaned the egr, inlet manifold , breather pipes, new oil filter , plugs , leads , coil pack, coolant temp sensor, ( had all these parts spare from old engine which ran fine but engines head gasket was gone) The battery is fine and also is the alternator , when the car is running is works perfect its literally just on start up when its cold. Any help will be greatly appreciated