Just put a FRST engine in a Hreg XR2i, changed the ECU to OFAB changed the EDIS and the MAP sensor and done the pin changes.
When the car is idling it really lumpy and sounds like its choking itself, when you get it on the road as soon as runs boost its fine.

Any ideas????

 

sound like could b overfulling have u had it set up,have you changed any fuel components

 

idle speed controll valve??
otherwise it could be an air leak?