Well, the injectors were stuck--another one started acting up too! Nothing related to uneven bolt tightening, it was more complex than that. After no positive results, I took the offending injectors apart and there were iron shavings inside. Apparently a cost-saving measure in production eliminates the step where the castings are cleaned out after machining.
runs on all 4 now but still has the wide open miss it did with the old injectors. They did need attention though, but they should have been serviced instead of replaced.
sometimes new isn't better