Hi all,
In case it us of interest/help to any one.
My 2.4 Suffered from a dead battery. I connected up a substitute to drive a couple of miles home. although it started ok the idle was very low and sometimes stalling. I charged up the original battery, and it was ok, but the idle revs were only about 300rpm.
I installed a new battery (as I was going on a long trip), and still had a low idle. After some 300miles the idle is fine and back to normal.
One thing I did notice was a short while prior to the dead battery the idle did not seem right.