Sabbath-7

84 gsl-se, when i start the car, it revs around 2k and slowly builds up to around 4k, then all of a sudden it falls quickly into a stall. i recently did a complete tune up, so im not sure what the problem is, thanks for suggestions

O 16581 72452 5

Could be alot of things, best bet is a vacuum leak. do a search, there's posts all over about this