whatwould it take to put new fuel injectors in?

You will want a mechanic to do this, since if they are not seated properly you can have fuel getting into the hot engine compartment, which is bad. You can replace just one, have a mechanic figure out which one is not firing, and replace the one that is bad.

agreed.

The z31 engines have a fuel rail/injector assembly, they should all be replaced. The upper intake manifold has to come off, so if you're not experienced, take it somewhere.

well i just went through that and if you have a good machanic you will be o k i went to the junk yard and bought three he only used one so yes it should be alright if thats the problem i have two injectors for sale dirt cheap if you still need them

Need iinterjectirs please