2001 Chevy Blazer surges under medium acceleration

Chevy TrailblazerEngine surges under medium acceleration, no mil light. Bad distributor gear?

Surges under medium acceleration

My thought would be more fuel related. Remove the air filter and test. If you see a change then you know it is fuel related. Concentrate on that area. Replace fuel filter, air filter and move to high octane at a different station at the next fill up.