Nige 84

Hi peeps I have just finished putting my engine in after spending thousands on pistons rods crank no expense spared and the only thing I have changed is inlet pipe from standard a and from standard headers to syns headers and it runs like crap up and down on idle smells like it's overfulin like crazy black soot puffin out of exhaust do u think it needs a map as it was mapped previously with a zen map with standard headers and inlet would this make so much difference to the running of the car this has been fully forged with. 5 oversize anyone got any suggestions?