A bottle of high quality injector clean added to the gas does wonders for cleaning up the injectors. I like RedLine and Techron. Unless the injectors are really bad, this usually does the job. Do yourself a favor and clean the throttle body at the same time. Doing a chemical cleaning on the cr of the intake manifold will also help. If you do those three things you will be very pleasantly supprised at how much better the car runs.
