I have a 1994 s10 blazer with a vortec 4.3. The problem that i have is that it isnt getting fire to the plugs. I have replaced the fallowing items. new distributor cab, rotor bug, sensor that goes inside the distributor, coil and plug wires and i even rebuilt the timing chain assbly. with new gaskets. It also has a new fuel pump with a new fuel filter. To me the engine is getting fuel but has no fire. Please can someone help me!!!!!!