My 4.3L is out of an 1991 S10 Blazer. It had a auto behind it, but now theres a granny 4 speed(NP465) and I'm thinkin that is part of the problem with the hole runnin rich. I'm thinkin that it is mostly the throttle position sensor know. But its rannin today and doesn't look like its goin to let up, so not sure when I can get out there and mess with it
