I was looking for some info on idle problems with 4.0 L ford motors and came across this library that is the BEST I have ever seen.
Someone might want to sticky this for it is a wealth of information. Not 100% pinto or about our older/cars, however it does explain general everything about automotive problems and diagnosis. Take a look and see what I mean.
http://www.aa1car.com/index_alphabetical.htmhttp://www.aa1car.com/