Hello , i am tuning a 2010 6.1 that has been swapped to a 5.7 now idle surged and hunted and was having a hard time returning to idle with out fluctuating so i fixed most of this and fixed the ve to an extent . now it idles well and goes into gear and idles fine while cursing the only issue is that every 5 minutes or so of stable idle it would surge real bad and almost stall but it catches it self and the rpm goes to 1300 then it idles back fine then it repeats every 5 minutes or so what could be the issue of this the surge happens with no peddal input as well ? i try to fix ve in the idle area but not outside it
attached is a log and tune i tried raising the rpm error from 320 to 550 to 720 but that didn't change anything i tried reducing the integral and proportional of spark and throttle but still this surge comes suddenly every few minutes hope some one can help