A few days ago I switched my AFX race pcm back to the stock pcm on my Neon. Now the car sometimes idles at 1600-1700 rpms. Why is that? What can I do to fix that? I'm using 87 octane again since I have my stock pcm.
Thanks.

 

I was talkin to a buddy of mine today about his srt-4 and somehow we talked about the same thing... he said when he restarts the whole car his car does that toobut thats because the pcm is tryin reprogram everthing.. he also said it eventally goes away...

 

maybe its running to rich? did u change the injectors when u changed the pcm or when you installed the apexi fuel controller?