i have a 02 jeep geand cherokee and the other day the check engine light came on and the motor lost power and was in a shimming idol i hooked up a scanning tool it read that the coil pack was bad i changed that and it ran good for about 2 miles then the same thing happend so i hooked it back up it said the same thing plus the camshaft sensor was bad to so i replaced both agin still bad result it will run but just for a short time then it starts idoling wild and i can shut it down start it right back and it runs fine for a little while then it goes right back idoling bad agin any suggestions would be greatly appriciated