rough running
 

Question for anybody out there. I replaced the fuel pump on my 1995 blazer. i reused the pulsator on the old pump. Also when i lowered the fuel tank, the vent tubes on the top of the tank broke off. Now when engine is running i sounds like a miss, could this be related to the old pulsator or the vent tubes? I have installed new plugs,cap rotor etc. also notice fuel smell. Any advise would be appreciated.

Start with the fuel system diagnostics. There is a thread at the top of the tech section for the '95+ Blazers. The issue could be related but as long as you don't have a leak, you have to start at step 1 of troubleshooting when the fuel system is involved.
I'll be hosing down my filter fittings today with free - all so I can check my fuel pressure this weekend.