When I cleaned my injectors earlier last year to pass emissions, I was able to access all of them. I do recall that I took off the deck lid; however, I was doing a lot more work. I didn't take out all the bushings then, either, since they were seated well (fuel inlet pipes were straight up, not tilted). To get to the rear bushings, remove the throttle body and take your time; also, get/make a tool to remove the bushings. I don't think it would be necessary to remove the deck lid to get to the forward ones, but it wouldn't hurt. When I replace all injectors and bushings, I will post the effort. Rob H.