There are 6 fuel injectors, one per cylinder. They are located on the top of the engine.
Where is the fuel injector located?
I'll bite, how do you install a fuel injector on a 1994 Nissan Maxima.
First of all you need to buy yourself a shop manual for your car and it will give you a step by step instruction on how to change your fuel injectors. Chilton is pretty good... I'll give you a hint...