Hey guys I just recently got a 1998 XLT 4x4 3.0 5speed ranger. Had it about a month now I already put new plugs an wires on it cause they where shot an gaped way out of spec. My problem isn't to big a deal so I haven't looked in to it much since I hardly use it but here's my problem. The truck runs excellent starts great an runs smooth but when you have the A/C on it feels like it has a miss its very noticeable on the highway it bucks quite a bit every few sec's but the A/C blows cold an I don't hear the compressor kicking on an off so that's not the problem also it dose not miss or buck under a load or up a hill just when the Air is on got any ideas?