hey so i have a 97 cherokee and whats going on with it is that when i first start it starts up just fine. Then about 1-2 minutes into idling in park it will become very rough and low idle and almost sounds like it's going to die out but then it evens back out after about another minute of the rough idle. Also if i don't let it warm up to the bad idle point, when i put it in drive sometimes it's as if its not getting any gas and wants to die, and I will push on the gas a couple of times and then it goes and it doesn't do that again... Any advise or anybody know what the problem may be? no check engine light and i'm probably at most getting about 10-12 mpg. I need some suggestions please!!