I have a 94 s10 blazer Tahoe 4x4 with the 4.3L.. the "Famous" spider injectors. I am I have had fuel pump after fuel pump in this thing, and I just changed the fuel pressure regulator. Once the intake manifold was off, I noticed half a cup of gas laying under there. I have changed the EGR (and added the gasket with screen in it), IAC, plugs, wires, cap, rotor. When I said fuel pump after fuel pump, I literally mean 7 fuel pumps. I started with easy things and am working through more possible issues. I heard it might have been vaccuum lines. I'm working on making a smoke machine to test everything, but at the moment, I am trying to trace lines and check to see the condition. I have found a few small issues, but nothing has improved the idle and first initial 2 gears. It smells like it might be running rich. I have been looking for refurbished injectors but as you know, they aren't cheap or easy to find. If anyone out there can help or give advise, I would be eternally grateful and my wife would probably buy you a very big thank you basket. We take this truck everywhere and I have done every thing to this truck myself. My wife is my mother's caregiver and this truck has always been reliable. Up until now, it has been running cherry. She has appointments that she can't miss and uber's all over town for a day, a few times a week, gets real expensive when you are on disability. Again, any advise would be amazing.