http://www.autozone.com/az/cds/en_us/090
If you don't have those tools, whack the inertia switch lightly, and try to start, or start and let run out of fuel.
http://www.autozone.com/az/cds/en_us/090
Click pictures to enlarge.How to change the fuel injectors on a 1996 Ford Ranger 2.3 4Cyl?
the injectors are located beneath your plenum...thats the big thing right on top of the engine...plenum must come off,there is probably 8-10 bolts,but first be sure everything around and on the plenum is out of the way... get a plenum gasket kit from a parts store,remove injectors and reinstall new ones...reassemble the top of the engine and fire it up!! piece of cake!