Re: Sputtering and black soot out of tailpipes
I'm certainly no expert on the Quad carbs - but you need to figure out why it's running so rich. Could be a bad O2 sensor, TPS, IAC, ignition issue, timing issue, or a slew of other things I'm no expert on. I'm sure someone with more knowledge on these systems will chime in.
1992 25th Anniversary RS T-Top
350 Carb 10:1 Dometops Mild Cam
Hedmann Headers Hi-Flo Cat/Aerochamber Muffler
700R4 B&M Shift Kit LS1 Disc Rear w/3.42 Posi
Poly Bushings Eibach Prokit Bilstein Shocks/Struts
HOK Candy Teal on Silver Flake IROC Hood