i just put a type r tb on my skunk2 manifold. i run a p28 based rom in my p72 ecu. i had no idle probs before and now, i have my idle drop to 625 whenever i stop with no load on the engine. i have my idle set in the rom to 750 and before it used to be dead on. now, i find my target idle actually fluctuates down in hondalogger to low 600s. Why would it do that? I increased the IAC duty cycle a little but that didn't solve anything. The tb doesn't have a fast idle valve like the gsr did. i bypassed the coolant lines to the tb and ran it directly to my IAC.

torin

 

maybe this would help.. with hondata + gsr ecu my r idles at 650.

 

I htink you should try fiddling with the throttle body idle adjustment first, then going back in Hondata and readjusting duty cycle and see if anything changes. My friends integra started idling low randomly at times and we couldn't/can't figure out why. Also try fidding the timing at idle and see if it changes anything?