Drivability Issue Please Help

[DSMTalonAWD51]

Hey guys, hopefully someone has had this problem before and knows what it is.

This started happening yesterday all of a sudden. When I drive lightly around town, everythings completely normal. When i drive at WOT the car accelerates normally ( i am boosting about 16psi). When I drive the car under 'partial' acceleration with the gas pedal about half way down, my boost starts to rise ( builds up to between 5-10 psi) and the car gets louder, everything 'sounds' like i am giving it some gas but it does not accelerate, it kinda hesitates as if something is slipping, almost feels like a slipping clutch. does anyone have any idea?

i ruled out the clutch, it feels completely normal, and all vacuum lines are fine. since it accelerates great under WOT I have no idea what could be causing this. I thought maybe the o2 sensor may be acting up because i noticed that even during light driving my air fuel guage is going over to rich when it used to just bounce around until i gave it a lot of gas. but i figured if it was my o2 sensor i would have a check engine light.
someone please help thanks!

(its a 97 gsx, 16g, 1gen block/2gen head)

 

[RREDix]

I'm not too experienced but from what i've read it sounds like you might have a problem with you blow off valve or the BOV return line so try to check that out. Good luck.

 

[yankees1919]

How experienced of a driver are you? Example: If you are in 3rd gear, trying to go up a hill and only at say 1800-2000 rpm and try to accelerate, your boost with go to about 7-10 psi and it will feel like you are not going anywhere...But yet if you shift into 2nd gear you will not have a problem climbing the hill
I think that makes sense...If not someone correct me...But i believe that could be a POSSIBLE problem

 

[DSMTalonAWD51]

naa this isnt a 'lack of power' under acceleration issue, it feels like there is something slipping. this happens on completely flat roads between 3-5k rpm but as soon as i floor it the car will accelerate fine. it does almost feel like maybe the bov could be leaking but i have had it for 3 years and never had to adjust it for any reason. and i also checked the vacuum lines...