Join Date: Sep 2008
Bronco Info: 1989 Bronco 351w C6 32's
89 Bronco running rich
Hi i have an 89 bronco with a 351 and a c6. it is sped density and runs great while driving. it just idles rough and blows black smoke out when it shifts gears or at initial startup. every time you start it 2 clouds of black smoke appear out the sides, and all the time it runs it smells very very rich. lately it gets crap for gas mileage used to get 14 now gets 7. i ran 93 octane in it and no difference.