Hey to all. My 95 just got a nused motor stuck in it, after 2 years of being down. My problem is on cold start up it keeps huck a buckin until it warms up then it smooths out and runs good. This morning was a little cooler than it has been the last few days and it never warmed up to the temp that it had been straightening up at and it ran like poo all the way to work. Also even when its running smooth sometimes at a red light or wot not it revs up and down by itself. I had a buddy plug up a code reader thing but he couldn't pull a code off it neither can auto zone. Sounds like some kind of sensor but I've got no way of knowing. Any ideas ? Thanks in advance.