The BG44k is not flammable enough..[as it mostly detergemts]..............use the special BG Fuel Injection System Cleaner and run the engine at idle for the 15 minutes until empty.....let it spit and sputter and die.....then remove and return to normal.
http://www.bgprod.com/products/fuelair.html
I vary the pressure so that the injector sees 34 >44>55 psi during the process remember to block off return hose!
Then use BG ISC outside [the fumes will kill small mammals] as the Coup de Grace then immediately drive on the highway 15 minutes and exercise the crud out.
Spend an hour to perform these 3 separate cleaning [TB, plenum runners, injectors, valve stems and piston crowns and rings should make it look brand new inside..................at least where the air and fuel goes.