Not put any in my taco, but when i had my wrangler i used Seafoam. It worked pretty good. You can acutally put that stuff into anything or any engine. I worked at advance auto and it was hard to keep it stocked. It seemed to have worked.
Best fuel injector cleaner on the market is Sweepco 503. Recommended by the Porsche repair shop we frequent. Porsche CIS injection system* injectors are notorious for clogging up. Whenever one of our CIS equiped cars starts to run un-Posche-like, it gets a dose of Sweepco & treated to an Italian tune-up. If the injectors are in real bad shape, the repair shop pumps pure Sweepco 503 through them. It usually takes only 2-3 pumps before the injector is spraying normally again.