Throttle body injection was a bit of an odd duck and—like with carbureted engines—is challenging to use Berryman Intake Valve & Combustion Chamber Cleaner (part #2611) on.  However, it can be accomplished.  Basically, you have to take off the air cleaner and with the engine running at idle, carefully direct the product spray into the throttle body.  If the butterflies are not open enough, use the accelerator or throttle cable to increase the RPMs.  It is best to apply chemical to all injectors, too.  Just be careful of overspray as it can damage paint.