[sector95]

Adding most injector cleaners to your tank will do about zip.....especially if the injection system has been neglected and never been cleaned thoroughly. I would have the vehicle serviced with a professional injector and intake cleaning.... did this on my '00 and what a difference. This service will remove and clean out any deposits in the injectors and intake track. It shouldn't run more than $75 or so. Once you get the injectors clean, use Chevron Techron injector cleaner with every oil change... this stuff is expensive ($9 for a 20 gallon dosage) but it *does* work for minor cleaning and maintaining of the injectors.... with the other stuff you're just wasting your money.

mike