Originally Posted by Jonny Jeep
If the battery is very flat it will not run after a jump start. You need to keep the revs high for a few minutes to get some charge into the battery before it will idle on it's own.. I've done this with a hand throttle before, if you don't have a hand throttle you need to keep your foot on the accelerator, and someone else can disconnect the jumper cables.
Yes. After a jump your Jeep will not idle. Keep the revs up a little bit, have someone else disconnect the cables and go for a 5-10 minute drive on an open road. Your problem will be solved.