I did the same although used in-line fuel filters as adapters for connecting clear tubing on both lines entering the bottle..... as the purge ran through the system I could see junk clogging up these little filters (
http://www.supercheapauto.com.au/online ... 0203#Combo) ..... Awesome product and perfect results... the inline filters went from fluro orange to a black sludge after one bottle and the car felt great afterwards... less noise, more responsive... though no difference before/after on the feedback values . Also ran the active 'fuel test' now and then (using techstream) to get the pump at full pressure to speed up the cleaning... not sure it was a good idea but seemed to work well as it really got the juice flowing...