2000 Cougar @ 60 mph

[Pablo.station]

Hello,

I have a 2000 Cougar AT v6 with about 86,000 miles on it. no engine mods.

recently my car seems to be losing power when I get to about 60 mph. Any speeds below that it drives/accelerates fine. When I say lose power, what I mean is that once I hit 60+ mph it begins to hesitate for lack of a better word. The car stays on and I can accelerate through it but obviously I need to figure out whats wrong. Its been about a month now.

Things I tried are Lucas fuel injector cleaner + Cleaned the MAF sensor + I replaced the fuel filter about 20k ago but I can replace that again if I need to.
I can also replace the sensor if thats the problem.

The thing that worries me is that I haven't gotten a check engine light yet.

I have searched this site a another one but have not found anything useful, Any help/suggestions would be greatly appreciated!