Leaking as in from their O-rings? I feel like that would be apparent from smell/watching it do it as it runs. I've sent mine off to an injector shop when my #6 shorted out (EGR burnt my wires). But it's not unheard of to have injectors sticking open or closed.Thanks so much for your detailed reply; I have ordered a FSM which should be here in few days so won't need your generous offer to send me a copy of the procedure to measure fuel pressure. I am having an intermittent hot start problem so fuel pressure drop after engine shut off seems a good issue to check. Thanks again. The car has 289k miles and seems to have the original fuel pump. Do you have an opinion as to whether leaking fuel injectors could be an intermittent problem?
I'm going to do a cylinder drop test (maybe tonight after studying?)
Essentially it allows you to pinpoint the problem to a specific cylinder, if it is applicable.
You do this by having the engine idling (while it's experiencing it's running issue). One by one you unplug the injector connector. If there's a problem with (for example) the #2 cylinder (whether fuel/spark/valve/whatever), then when the #2 injector is unplugged, you won't see a change in how it's running. However if that cylinder is functioning normally, when you unplug the injector, then it will run worse. You only want to do it with one cylinder at a time (just making sure you don't have like, half the injectors unplugged).
Along with that, if all 6 result in worse running, then you know that the spark plugs/injectors aren't the issue INTERNALLY. However if one is leaking from an O-ring, then that would be external-ish.
I have heard of the FPR having issues once warm, won't hurt to overhaul the fuel system like I did if you haven't recently. My FPR was original to the car, I believe it was bad. However I'm experiencing multiple issues at once so