King Snow Dog
Join Date: Feb 2007
Location: Houghton, MI; Neenah, WI
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NO, Never run a vehicle with the battery disconnected. The battery acts to smooth out the noise from the alternator (remember, the alternator is an AC generator). Disconnecting the battery once the vehicle is running could induce a lot of noise into the electrical system and possible damage electronics.
Leave everything off and disconnect the battery. While you're waiting, you can clean the TB as mentioned. If you really want to go all out, you can take the TB off and take off the IAC motor and TPS and really give the thing a good cleaning but you probably don't need to go that far.
Reconnect the battery and start it up and let it idle. With the battery disconnected for a while, the PCM resets. It will monitor the engine and relearn what it needs to do to make it idle properly.
If that doesn't work, next step would probably be to replace the IAC (Idle Air Control) motor and the TPS (Throttle Position Sensor). Disconnect battery again, replace sensors, reconnect battery, start and let it idle.
I've seen many 4.7 idle issues in the past rectified by replacing the IAC, TPS or both.
2000 Durango SLT 4.7L 110,000 miles
Dwight 68mm Polished TB, Bilstein Shocks, Addco Sway Bars, Magnaflow Muffler
Drawtite Front Hitch with Custom Grill Guard
Proud Member - TMPH #12 - CELOPH #12 - DOGs #12- King Snow Dog!