Note that BG 44K cannot be bought at AutoZone,Advanced, or Pep Boys or any place like that--it is not a cheap product.
AGAIN--just type it in Google and see what people say about it--I have used it for years--had a 635CSI that set for several months and wouldn't hardly run--only with that product was I able to sell it!!
It is running around $20 at most places which are: high performance BMW,Porsche, etc shops--would use telephone to locate or buy on-line. When you sense the engine running 'rough' or seemingly detect a skip or hestation on acceleration--other words, things are just not right, then put it in the gas tank. It is 'strong' so don't overuse it.
Surely someone out there has used this before--if you have been 'into' high performance cars !!!!!
Also: I bought a 2 vol shop manual for my 93 LS400 at the dealer for $110 in 1999---this was a DEAL; I recommend to the mech. inclined [you won't even be able to replace the radio antenna without knowing what 2 buttons to push !!!!]--I have had shop manuals on almost everything[from 1934 on up] and they are the Lexus are the best I have seen--but the car is complicated !!!!! Ford wanted $600 for a set on the 97 F150--finally Haynes came out with one!!
Richard