kevin micallef

Hi I have a fiesta mk3 I changed the engine to a escort rs turbo engine and it was with k jet fuel system and I covered to efi system with a DTA s40 ecu for this past 3 years everything was good but now I have a propelm when the car reach 90 degree's start hunting and cutting out when idle what can be the problem I changed the map sensor theTPS sensor the water coolet temp sensor and still does it hope some can help me