- Sep 4, 2004
- 315
- 0
- 16
2002 gt, 76k miles, mods listed in sig, my normal idle speed was around 780, but one day it changed to around 1000rpm. its been pretty constant between 1000-1100rpm for about a week now, but today it started to hang close to 1500rom until i slightly let the clutch out while in gear and it will drop to 1100rpm. i tried cleaning the IAC, no change. i tried unplugging the IAC and the motor sits at 1100rpm. i looked through all the live data section on the DiabloSport and couldnt find anything about the IAC Duty Cylcle, and before i replace the IAC i want to make sure thats the problem. Ive checked for vacuum leaks but cant find any. i have the restriction plate installed, but without it there is no change except that the rpm's hang much longer. any ideas? thanks guys.