Hey everyone,I have a 95 blazer with the 4.3 vortec and it started missing every so often then just about everytime I drove it. So I changed the wires and plugs, then the fuel filter then the o2 sensors on the down pipe. Its not doing it so bad now every 15 minutes or so of drivng it'll start missing.What could be wrong I'm stumped??? would clogged cats do this? Thank in advance.

 

You did not state that you changed the cap, and rotor. I would do that first. The cat being plugged would not cause that. Also does your cap have the wires that come off the side, or off the top? If they come off the top it could be cracked pickup magnets.

 

It could be a clogged cat, My Beretta missed n it was caused by a clogged cat..replaced it and ran really nice

 

Woops I have changed the cap and the rotor button. As for the wires I want to say they were on top not the side. What are pickup magnets? I'm gonna be getting the codes pulledbutit might bea few days.