94 ford ranger 3.0, 2wd. Just fixed my last starting problem now I got another one, the next day. Now when I turn my key it clikcs once and that's it, won't turn over. No battery cables are loose, wires on starter aren't loose, have to pop start it everytime I shut it off.

 

Make sure the ground wire on the engine block is clean and tight.

I had the same problem, and it turned out to be a badly oxidized battery cable on the negative side.
The battery terminals and lugs were clean, but the factory "crimp" was internally corroded causing too much resistance.

 

Thanks for input, I will try that tommorow and keep updated