Injector leak down test doesnt work.

[dhirocz]

790k miles. Ive got all the symptoms of a bad injector, so Im outside doing an injector leakdown test. I can verify that I do have a leaking injector on the front bank by cranking. After 4 or 5 seconds, Im getting bubbles. However, I cannot get any bubbles when I bar the engine over. I also notice that the engine is now much easier to bar compared to last time.

Is it fair to assume that the leakdown test requires compression to work, and given the facts that the symptoms are telling me the engine is worn out? Any other ways to know which injector is leaking? Im now at a loss here.