My car is idling from 2500 rpm to 1500 rpm at park. When I put it in drive the rpm is at 1500 rpm and does get any lower. I have tried to troubleshoot it by disconnecting the vacuum hose going to the map sensor and the erratic idling stops. I've also notice that if I disconnect the idle sensor the erratic idle stops. I have tried changing out the vacuum control box, switch egr valve, fast idle sensor, cleaning the and tighten the intake air control valve and nothing seems to be working.
Sunday, May 5th, 2013 AT 3:18 PM