Are gtir injectors hard to remove? In a mechanics mag i read about injectors sometimes needing to be chiselled out
As others have said, na, easy.
If you have a front mount intercooler, easier.
Without the intercooler in the way, disconnect the two fuel lines, one on the Fuel pressure regulator and the other on a pipe.
Remove the 4 bolts holding the rail and gently wiggle and lift the rail.
Sometimes the injectors will come out still attached to the rail, sometimes 1 or 2 might stick in the throttle body.
Be careful that no muck drops into the injector hole, so as soon as the injectors are out cover or plug the holes.
If you are having them cleaned and flow tested get a seal kit (with baskets and pintles included) installed as well and they will be almost like new.
If I missed anything please fill in the steps.
PS. When installing injectors with new seals, they may be tight, so they just need to be gently massaged into the rail and the throttle body.