aight my blazer is sputterin everytime I hit the gas and takes forever to get up to speed and when I get to about 65-70 its doesn't wanna excelarate anymore can anyone help me?

its 1991 4-door 4x4 s-10 by the way

Does your exhaust smell like rotton eggs?

Does the exhaust sound growly? Louder?

does the rpms go up but the speed does not?