Here is the story. My daughter was headed to school and the blazer died. She said nothing crazy just died. I knew I had a problem with the fuel system so I started there. Had to replace the spider assym. I did upgrade it to the newer style. Pressures are holding now so I think that problem is solved. Now when I try and start it, it sounds like it is dragging. You can also hear it try and backfire. Sounds like a timing problem but I don't know for sure.

 

There is most likely a code on the memory that may give you some clues and us more info. Take it somewhere where they can read them for you. Many places will do this for free.

 

Did you remove the distributor, (or any of the plug wires) when replacing the injector assembly?