Hesitation exactly at 25 MPH and then again at 60 MPH Consistently

'01 v6 Tacoma 342,000. I keep getting a slight hesitation exactly at 25 MPH and then again at 60 MPH?! Not throwing a code. Fuel filter new, spark plugs new and properly gapped. Seafoamed it and cleaned the throttle plate and surfaces which was decarbonized. Changed the spark plug wires to new Npk's. When I changed the plugs noticed corrosion on one of the coils where the wire attaches. I cleaned it up but I am thinking that if corroded there probably inside corrosion. Coils are $175 to replace so before I attempt that...thoughts? Any ideas what else it might be? Seems to be less notice when I just gun it or after it heats up.

 

Where is engine rpm or throttle position? Test the throttle position sensor per manual and see if that's playing a part.

Generally if the coil is bad, heat will make it worse.

 

Watch your rpm not your road speed .

Auto or manual ??

If an auto it might be a Transmission Issue.