I have a 93 and I am having heater problems no or very little heat even after i drive for any period of time. any suggestions where to go first?

 

First thing I'd do is make sure the engine is warming up, a thermostat stuck open will make for a cold heater. If the engine is warm, check the heater hoses to make sure both sides are hot and there are no restrictions in the water flow. Try these and get back to us, we'll go from there.

 

There are two thermostats available for Broncos. A 160 and a 180, I believe. When I moved to Colorado I could not get any heat in the winter until I switched to the hotter t-stat. Solved the problem.