the iac on my ford taurus fluctuates from time to time and sometimes cuts off ive cleaned it and it does nothing. i asked my auto teacher and he said that the iac was my problem and cleaning it wouldnt fix the problem it has to be replaced. he disconnected the plug from the iac and it portrayed the symptoms that i had been having. you need to confirm your problem before you throw parts at a problem that might not fix the problem. unhook the plug from it and see if it might be your problem.