Hi,
The fuel injectors are between the intake manifold and the fuel rail. See pic 1 below.
As far as replacement, you will need to disconnect the negative battery terminal first. Next, the fuel rail is unbolted. Once you have done this, the injectors are accessible.
I attached the directions for replacing them for you below. (Last 3 pics) Also, here is a link that explains in general how it is done. Actually, you will likely find this more helpful than the manual's directions. LOL
https://www.2carpros.com/articles/how-to-replace-a-fuel-injector
Let me know if this helps or if you have questions.
Take care,
Joe
See pics below.
Images (Click to make bigger)
Saturday, March 18th, 2023 AT 12:31 PM