i have a 1987 dodge pickup with a 318 and ther is like little black granules of charcol lookin stuff in the vacuum and i heard sombody say they have charcol filters....can i just replace the filter or bypass it in someway so my truck will run right? ps it will idle fine but when you hit the gas it wants to die and most of the time it does and i have dropped and cleaned the tank rebuilt the carb put a new fuel pump in and added heet to it but none of that seems to help at all which makes me think that its the vacuum with charcol in it............where do i buy a new filter/vacumm or how do i bypass it? thank you