[wolfox]

3M also makes a kit with adaptors of all sorts in them to hook up a can of Injector cleaner to your fuel rail(s). Essentially, something like this would plug into the schrader valve after you did something to block flow to and from the tank. (A set of caps screwed into the nut kit lines yould do the trick, and then you yank the fuel pump relay). You then start the engine and let it run at idle on the can until it stalls. Takes about 15 minutes or so, and then you're done. Remove the caps and shrader valve adaptor, reconnect your lines and replace the relay. It's costly, compared to just maintaining performance with a dose of Techron - but it's like getting a whole new vehicle for certain. I remember reading up on the 3M kit, and haven't tried it myself - but then my CPI is stock new - but the high pressure can and the bullet-proof cleaner in the can is top notch for getting randomly missfiring injectors cleared. Like Techron, it can only clean what it touches so this would not be good on an engine with completely plugged up injectors.