Join Date: Aug 2002
Location: South Australia
Don't know if this is exactly the same sort of issue as I had, but, I have similar mods to you - full Akro, K&N filters, PC3 & Ignition module, though my engine has been built to 1287.
I had an issue, probably due to the increased compression, causing problems starting especially from cold. The fast idle cable wouldn't give enough revs to maintain cold start running, so I would use the idle screw as others have done. The problem is, this would bugger up the mapping in the 0 to 5% fuel range in the PC (hope I've got that right, as KZScott helped with my fix). This was causing the fuelling to be constantly out of wack from cold idle. Fix was to set the idle screw to wherever I needed it, then download the map again. This fixed the starting cold issue, and subsequent starting when hot too. Scott or others may chime in to give a better explanation.
Hope this helps in some way, I learned something about PC's that day!