heavy over fueling
 

i have a 91 n/a here lately its been giving me problems with over fueling. i will be driving motor will start cutting out so bad it cant pull its self use gas like a siv and i will be stuck for like ten min while it spits and sputters then it will just come out of it and i will drive for a little bit then it will do it again later the problem usually only happens if i have been driving for 15 to 20 min. right before it happens the check engine light comes on then shuts off while its doing it......theres black smoke (not a hole lot but its dark) please any help i need to fix so i can sell

get a Fuel pressure regulator that might help...either that or your injectors might need to be rebuilt