Its a Jeep, most jeeps are like that, at least thats what i hear. Mines the same, it takes a little while to get started too now because of the cold weather, i wouldn't worry too much about it, but if you do, get it checked out for the winter, but i don't think there is really anything wrong with it.
Jordan
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87 XJ: 4" lift, 31x10.50 BFG's, roof rack, ramsey 8000 winch, hi lift jack, cb radio, swaybars disconnected, and some other stuff