Are 16in 2005 Honda Pilot tires interchangeable with 15in 2001 Chevy Blazer tires?
Engine 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.