When i WOT in both auto and man, it will get near redline and completely just become unresponsive on throttle unless i let go of the gas and slowly ease back on.

Just recently ive been having this issue, possible TB getting stuck?

Ex: getting on freeway from an onramp and i WOT, it will climb rpms till near red then drops to 4k and sits at 4k while the throttle feels kind of unresponsive.

Only mods are a JWT popcharger and motordyne spAcer installed a year ago. Just recently been having this problem.