Fuel injectors spraying to much gas

To be honest, with an 89, all you can do is replace the injector. how an injector works is there is a small amount of current that is run to a coil around a rod (if you are unaware, this produces magnetic fields). the magnetic field produced pulls up what is usually a small ball, allowing fuel to go through the tip of the injector nozzle. all you can do to fix this is to buy different injectors.

just a question..why do you think they are spraying too much fuel? because it may just be that you have excessive fuel pressure and your fuel pressure regulator is bad. hit me back.