95 K1500 with the 5.7L. Alright, my truck is burning incredibly rich. It has been this way for as long as I can remember. I have done many things over time to it to figure out why, but nothing seems to help. I have done everything from changing plugs and wires to changing out the coil with a hotter spark in hopes of burning off the extra gas. I recently changed out the stock intake and TBI with an Edelbrock Preformer Manifold and a Holly 502-9 TBI so that I have more control over the air to fuel mix....still nothing. The only thing I can think of remaining that could be the problem is that I am running a true dual exhaust with a crossover and no cats. Could the lack of back pressure cause it to burn rich? I have had older model trucks, back in the glorious days of carbs, that I could run without cats and have no problems? Any help or advice would be greatly appreciated.