Hi, I have just converted my EFI XR3i cabriolet to ofac turbo. I had rough running at idle and hesitation etc ... Also my CO pot did nothing. I put a CO tester on the car and found the CO to be very low and HC to be very high so their was an obvious fault. I found my standard 1AFA wiring was already in pins 27 for CO pot and pin 45 for MAP sensor ! I didn't think this was the issue because all the guides say to do this anyway BUT It still ran rough,
Anyway I found that the CO pot wire in pin 27 needed moving to pin 8 and pin 45 stayed in place , the CO and HC are now fine and the car runs much better ! This might not be your issue but it worked for me