88 4.0 and auto, any way it was running great and very strong. The next morning it cranked great but would not start, diagnosed a bad fuel pump. Replaced fuel pump, now it starts but runs realy awful and rich and the throttle does nothing but make it richer. Pulled the plugs and they all looked the same, black and sooty. Put in new plugs and still have the same results, I'm at a loss as to what is going on because it ran so well before the fuel pump went out. Checed fuel pressure and it was 40 w/vacume unplugged and about 34 w/vacume plugged in? Thank you in advance for any input.