OK, here is my problem.

in between 2k and 3.5k there is a studdering in acceleration.
Feels like a very gentle bucking, but very annoying.

I've changed the fuel filter and all spark components.
Now I'm leaning toward fuel pump or badly clogged cat.

Any info appreciated.

T

 

clean your maf also

 

connected to the air filter box??

 

Yep. Just spray it out well with carb cleaner, let it dry. Don't touch any of the internal bits, they're delicate...

 

I would use contact cleaner to clean the MAF,
cause ether is a little to harsh for the MAF.
just my 2cents.