Replace fuel pump before it quits?
My 93 Ranger 3.0-liter has almost 290,000 miles on it, original engine and fuel pump. I've owned it since 1998, when it came to me with 122,000 miles on it. I've changed the fuel filter about every 60,000 miles.
The pump is not malfunctioning, however, I am contemplating replacing it soon, preventively. I won't do it myself, my shop estimates it will cost $500 ($800 with the Motorcraft pump and sensor unit).
I'd like advice and reactions to my plan.