Power Cut/Hesitation when increasing throttle
 

I have visually checked my coils, spark plugs have been replaced. Only this left to inspect is my cat. My car starts cold/hot perfectly fine. Under normal driving it is fine but as soon as i would increase the throttle to accelerate "Harder" it basically just hesitates and makes a very dull stalling noise. Hard to explain. at first i thought i got bad gas maybe so i burned off a tank and put in some seafoam. Well that was a tank ago and i'm stumped. I think it could be my cat. but i'm skeptical because its not rpm based. its based off throttle increase. Any idea guys?
Car info:
-2004 Rx8
-Coils are 20-30k old but inspected and no burn marks were visible. (I assumed that means they are functioning)
-Plugs are brand new
-Mileage is 87k.
-Fuel pump assembly + filter are two months old


-Thanks everyone

Burn marks means nothing, the coils need to be tested properly (search). It could be a clogged cat, it needs to be tested or removed and looked at. Any problems starting it when it is hot?

No. Like i said it starts cold/hot perfectly fine. Ill inspect my cat. If that looks like fine go back to my coils.

change ur coils, the marks doesn't mean shit (have it or not)

unless it's 100% dead, will start a car fine hot/cold, it's just that when you need it to go fast (hard accel) , it throws the white towel.

I just had another 8 fixed yesterday, car starts fine, but refuses to do hard accel, swap coils to brand new C version, everything fixed.

You might be right...got a flashing cell today. Looked under at cat and no red. still goin to do a closer look when i replace the gasket. welp. BHR ignition here i come.

Cat was checked and its fine. BHR ignition is on the way.