More than likely the valve lifters, if it only happens when the vehicle is first started, then goes away or gets quieter. I would not be concerned with it, I assume the vehicle has high mileage. Maybe switch to a synthetic oil and/or add an oil conditioner (STP, Lucas, etc.) next time you change the oil. If it happens during acceleration it could be pinging caused by preignition, this could be fixed by using a better quality fuel.
That is lifter noise, they probably need adjusting
A clicking noise in the engine of a 91 Ranger could indicate a problem with the valves. A valve lifter in the engine may be worn or stuck.
I have the same car with the same clicking noise right after you start the engine. The noise stops shortly after starting. There was a recall from Chrysler for this problem. Contact your local dealer regarding this matter.
The Battery is shot and you need to replace it.
Possibly the lifters?!?
Where is the clicking coming from? Within the engine compartment or inside the car?
dead battery or bad starter (with the clicking, I'm 95% sure its the battery)
It might be the relay on its way out. Or might be nothing to worry about.
CV Joints are the most common cause.
If clicking while trying to start then might be a bad starter. If clicking while running, then might be valve/lifter noise.
clicking noise when trying to sart engine usually indicates a flat battery.if the battery is not the problem ,the starter motor needs repair.
You need to check your starter or your starter selenoid.