It's a 91, from what I understand it's the first year of the computer and the throttle body injection that it has. Good looking little truck, but it will just quit at any given time, just like you cut the key off, then it'll come right back to life. Been doing it since I had it, you never know when it's going to do it. Might go weeks trouble free, or you might not get out of the drive way before it starts. I've replaced every sensor on it, some twice, still does it.
I just got it from a shop in Concord a couple of weeks ago, the guy said he fooled with the timing some, and drove it a while and it never missed a beat, said it was fixed. But, like I said, that's how it does, and i'm pretty sure the timing has nothing to do with it, it would run bad all the time if it was the timing, not just once in a while for a few seconds.