I had some troubles while out 4-wheeling over the weekend in my '79 Scout II 345 V8. At the end of a very narrow road I came upon some doofus who had parked their van, blocking the road (OK, I suppose it was a road I shouldn't have been on, so maybe they had a right to park there). There was one somewhat wider point where I tried to turn around, but no luck. I ended up having to back about 1/2 mile out. In the process of turning around, I was popping back and forth between 1st and rev. numerous times, while in 4WD. Something happened such that I just wasn't getting much power at all, and the engine died out a few times. I could floor the accelerator, which made no difference really. The vehicle just sort of sputtered along, in little hops. Also, during the long reverse out, it let out a very loud backfire, but only once. Even after backing out to where I could turn around and go forwards, I was still having this problem. A couple of times I turned the engine off and let it sit for 10 to 15 minutes, which seemed to help for a bit, but then the same trouble started again. It was also somewhat difficult to start up a few times. Finally, after reaching a somewhat main road and travelling downhill for a few miles, things got back to normal, and it ran fine all the way home.
I'm not much of a mechanic, and am baffled by this. I should add that this happened a couple of times before (last summer), but after bringing it into a Scout specialist for service, I thought the problem had been fixed. I guess not!
I almost hate to admit this, but after it started running well again (after going back to 2WD), it occurred to me that maybe the transmission wasn't engaged properly. It is rather difficult to tell where the divisions between 4WD-high, 2WD-high, neutral and 4WD-low are, so maybe it slipped out a bit when I was doing all that forward-reverse switching.
Or, maybe there is something else wrong entirely. Anyone have any ideas? I may not have explained this very well, so if there is anything else that might help in diagnosing this, please let me know.