OK. I watched the clip yet again. The injectors are outboard of the SC and almost the intake manifolds but under them a bit so off the intakes have to be taken. Then why could I not change the injectors just as in the video? I found a vacuum leak, maybe something I pulled out but maybe there for a while, maybe it will not run lean if it had a vacuum leak, unmetered air without fuel added for it but I would think I'd have heard the leak before. Please explain why the SC has to come off please. mark