Injectors in 2QM and 3QM engines are easy to remove ... just two bolts
on the injector hold down (just be sure to 'vacuum' the injector bore
with a strong vacuum to prevent 'crap' from falling into the
combustion chamber before you pull the injector out).

The injectors are also easy to send to an injector shop to be checked
or rebuilt.
"Injector shops" are common in metro areas .... as virtually all
automobiles and trucks nowadays have injectors.

The 2QM and 3QM engines are not all that sensitive to air in their
fuel lines, especially air in the lines downstream of the injector
pump; just bleed out as best you can ... and the engine will usually
start right up.