What signs, other than leaking, indicate that an injector pump is beginning to fail? I've had a few leakers, but never a complete failure.
White exhaust smoke. Internal pressure problem.
OH ***ty, my car does not start, maybe thats the prob,

were can i get a IP? How much?
you need to figure out why your car doesnt run first. not just throw parts at it.
thats the difference between a decent mechanic and a GREAT mechanic, the ability to diagnose the problem.
Before I heave a pump off at the breakers, I undo the pump outlet banjo bolt and look at the fine mesh filter that hides in it. Any sign of metallic nastyness and I run away.