95 S10 Blazer 4x4 4.3L vortex. Can't figure this thing out! Has been missing and losing power for a few months on longer distance trips (Lubbock to Dallas 300 mi). Finally broke down For good. Replaced fuel filter, fuel pump, PCM. Had a mechanic run diagnostics and not throwing any codes or any codes in history....battery is draining fast, but when charged will crank but won't fire. Was firing with direct fuel source. I don't know a lot about cars as I am in the learning process, but have had some ppl that do know helping me out and bow they are lost... Anyone else have similar issues?

 

In my 98 I had the same no start with out direct start fluid injection. You need to invest in a fuel pressure gauge $50ish at checker o'rilley. My fuel pressure was spectacular but wouldn't run with out starting fluid. Ended up being the spider injection system. Suggest the aftermarket fuel injection system I think it's made by Bosch. The search function will point you in the right direction. Fuel pressure should be 60-66psi FYI