My 1992 Chevy blazer, with a TBI 4.3 runs decent, but the exhuast sounds a littel...

...sputtery? it also at times feel like it is underpowered, and a 4.3 is decently powered little motor especially in a little s10 blazer. the exhuast doesnt have a healthy tone to it, it has a a fluttery/sputtery tone to it.
 
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