Hey all, picked up an 04 Ram 4.7 w/tow package, 99,000 miles, so far happy with it. Started doing this, when i start the engine, it idles high/then low, can't seem to find where it wants to idle. Then finally settle at 650 rpms.

Is this typical or common for these trucks?

Anything else i may need to start worrying about, or maintenance i'll need to do?

Thanks!