ok my blazer seems to be cutting out from 2000 to 3000 rpm.. I have replaced plugs, cap, rotor, coil.. The previous owner had the cat cut off but it just started doing it. Idk wat the problem is.. Anybody know where i should try now?

 

Have you changed the fuel filter and cleaned the EGR valve? Also, you might use the 96+ Fuel System Diagnosis.

 

my blazer would do that too, from 3000 rpm on up it would sputter nasty. i changed the coil and Ignition control module mounted with the coil. It worked... seems to pick up a lot faster

 

Had the same problem about a year ago. Shop told me that model doesn't like generic parts and had to replace all of mentioned and the fuel pump.