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Half Boost!!!



You didnt answer my questions.

Do you have a real vacuum/boost gauge to figure out if it really is not seeing the 6-7 PSI a stock GTP gets?
Click to expand...

I need to know what the REAL numbers are to help you, reading the lego's on the dash does nothing, for all I know the DIC's boost gauge is broken and thats why its not filling all the way up.

And check for broken vacuum lines for leaks.
 


Check your BBV and make sure the lever is moving up and down completely when someone gives it throttle. Try and hold the lever all the way down while someone gives it throttle and watches the boost.
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why should i hold the lever down then give it throttle? wouldnt that give me no boost because the valve is staying open idk im just not getting it and would really appreciate it if someone explained it
 
the bbv is open when the lever is in its up postiton. i had this same issue and i just disconnected the line going from the soleniod to the bbv and all works perfect next time use search bar for i have been chastised for this also it is your soleniod that has malfunctioned. unplug the line and come back and tell me im right:th_thumbsup-wink:
 
im having same issue...so i did what u said and unplugged the line from solenoid to bbv and i get full boost but only after 4k rpm below i wont get no boost at all so connected back the line and back to how i was i punch it and gets half boost even in low rpm wot but stays half ways in wot shift where as disconnected i got full boost on wot shifting but no boost on low rpm...what can i do to fix the problem? replace bbv? or bbv solenoid?
 


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