So now that I have installed my boost gauge I can watch it spool up to about 15psi and then go back down to 7psi all while i'm on the gas. is this a diverter valve problem? or do i have a problem with the wastegate? or solenoid? I need help.[X(]

 

If its not holding the boost I would assume DV. Which one are you running and when was the last time you replaced it?

 

also a ko3 will not hold boost all the way to redline. it runs out of breath

 

What should a k03 be pushing with a dahlback stage 1? And I have not replaced the DV but one is on it's way to my house.