I ran a can straight into the IP. I was (and still am) having some intermittent power problems that seem to have something to do with the advance mechanism. The Sea Foam seemed to improve it slightly.
I'd expect it to help the pump more than the injectors. Coking is pretty difficult to remove, and I doubt that exposure to four ounces of solvent for two minutes (about how long it takes to go through a pint, and assuming 4 oz. goes to each injector) will do much to cooked-on deposits.
I strapped the can to the side of my filter, and ran the fuel return back into the can to keep from sending the overflow back to the fuel tank.
Jack
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'83 Isuzu P'up Diesel LS - Original Owner
JoeIsuzu@IsuzuPup.comIsuzuPup.com