A local owner's car wasn't running good so he also tried fuel injector cleaner. The car is now at P.J. Grady's because it won't run. I agree that unless the car has been used regularly or at least had cleaner used previuosly you should avoid it as a quick fix. Modern fuel will slowly remove the deposits if the car is used regularly. As for the fuel injectors plugging up they were probably already in need of cleaning or replacement which is why there is the temptation to "fix" a rough running motor with "Magic in a Bottle". On the cars I have worked on even though the injectors sprayed like cr-p, after I cleaned them they worked fine. IMHO you shouldn't have to replace the fuel injectors, just clean them and replace the rubber seals which become hard and shrink causing air leaks. Replace any missing or broken retaining clips and use new copper gaskets. It isn't just the spring that causes the problem, I think most of the trouble is caused by the dirt and deposits that build up on the seat inside preventing the injector from spraying right and closing completely. While you have the injectors out always check the #'s on them, someone may have replaced 1 or more with the wrong one! They may look alike on the outside but can work very differently! David Teitelbaum vin 10757