Never had the injectors out, nozzles replaced, tested, nothing. Never had a reason to, until now maybe?

In most of the reading I've done it seems 10K isn't too long for valve adjustments, and I last had mine done by the people who do all the work I don't want to do, and they do a great job. So...I have a gut feeling its not the valves. Now, the injectors, well.......??

mark