hi boys and girls i bought a fiesta turbo (OFAB) a little while ago and done a shit load of work on it to get it on the road and now its on the road ive found another problem!!!!

first ill say that when i bought it and drove it back it was so fucked and running shit that i wouldnt have noticed it if it was there or not

basicly whats happening is when i start it from cold it fires and runs lovley but when i touch the throttle the revs dip abit before picking up, and when i pull away and when driving when cold its very missy like the coil pack is going tits up but as it warms up it runs perfectly and then when it up to running temp it starts to kangaroo abit and u cant drive on lite throttle, it has to be accelarating or going balls out, also on lite throttle as i back off it sort of bogs down and then when to touch the throttle again it sort of bogs up (if u know what i mean) like it comes back into life with a jerk. theres no missfire when hot though and doesnt cut out (yet)

i thought it might be coolant temp but im not sure as this is the only frst ive had that is giving me grefe

some one please help me

the parts i fitted that could be related are

car loom (but i know its a good one)

idis mod

map sensor

co pot

isvc

also what exactly does the co pot do????

please help!!!! im driving this car every day and its driving me up the wall!!!