Well, mainly I want to replace them because my car is almost at 100,000 miles and BAT suggested in their description of the item that on a high-mileage car it would benefit to change them when you do a tune-up (obviously not as frequently as spark plugs or wires, but at some point). BTW: I have run a few bottles of injector cleaner through them, and I think they're probably pretty damn clean...gasoline itself has cleaners in it that are there for that purpose, so injector cleaner straight wouldn't do much anyway.
And I'm having some fuel-related issues, so maybe that would be a good step to take to narrow down the problem. Plus it would require me to take off the UIM, which could probably use a good cleaning and the gaskets need changing as well. So I might as well knock all of that out at once.
Anyone else have any information as to a year difference/separation between fuel injectors? I would greatly appreciate it.
