when is it a good time to replace my fuel injectors?

Question

i drive a 1991 honda accord with 185,000 miles

http://www.autoanything.com/fuel-systems/61A2306A0A0A2046124.aspx

these seem pretty good and have gotten good reviews too.
10% more flow
ive tried fuel injector cleaning service, and the bottles you buy at auto parts stores, but these things can only go so far.
after almost 17 years of wear and tear, i would like to know when it would be appropriate to change them.
at about how many miles am i due for a new set?

Answer 1

You can change them whenever you want, but they're not exactly part of your scheduled maintenance. And unless you're building a race car with a custom computer, I would replace them with original equipment or equivalent, as extra fuel flow will just cause your car's computer to shorten the injector pulse width to reduce the fuel anyways. Basically, they won't be any better for you.

Answer 2

You should change when you think that cleaning them is of no help there really isn't a set mileage or time to change them.I have seen them go 300,000 when they have been cleaned and injector cleaner was used regularly.

Answer 3

If they quit spraying, you will need to change them then, but injectors don't go bad that often!

Answer 4

Not at all. They should last almost forever. And some of the cleaners work fine.