I've been fighting a starting issue for months now and thanks to you guys I've concluded that there is an issue with the circuit that tells the IAC Valve to close when the vehicle is being started. However, replacing the IAC valve twice, cleaning the throttle body and IAC inlet, and tracing all the wiring has not resolved the issue. Basically the Jeep will not start/idle unless I step on the gas and maintain idle until I'm in 2nd gear and each time I've pulled the IAC the pin is in the fully extended position.
But lately I've noticed a new symptom. First thing though is that I do have a remote start that the PO installed and trust me when I tell you that I am leaning towards blaming that as much as I can blame anything else. Anyway, sometimes when I go to start the Jeep when I turn the ignition all the way I get nothing as if I have a completely dead battery (no clicks, nothing). When I turn the key back to off and try again it starts up just fine and I know it's not a battery issue as my clock on the radio & all the settings are still correct. That got me thinking. Since there is a circuit that tells the IAC to open when the vehicle is running and a separate circuit that tells it to close when the Jeep is being started (or however it actually works), could a faulty IGNITION SWITCH be causing my IAC issues since I'm assuming the message to adjust the IAC originates there? It would explain the infrequent dead battery when the key is turned issue (though again I almost want to blame that on the remote start but I rarely use it so every time there's been an issue it's been with the key being used. Just trying to get my hands around this problem as my wife won't drive the Jeep anymore because the starting issue is now happening about once every 10 tries where it used to be only about once every 100.