ive got a 93 touring 100k with new turbos mods include a boost guage and blitz air intake the car is only making 5lbs of boost in primary and secondary and breaks up around 4 to 4.5k rpm .When this happens boost goes even lower but it idles good .Also when you try to boost it up in the 2nd turbo theres really no power and when you let off, it sounds like a huge suction letting go please point me in the right direction thanks greg ps i also have a dp but its not on yet

 

Everyone is goin to tell your to search because this is a very comming thing. But I would say for starters, check your bov's, they leak a lot and cause low boost. Next check the ic hoses and the ypipe for cracks, they are very hard to see but can also cause this problem. And lastly, change your vacume hoses to silicon ones. Hope this helps, I just fixed mine, its was my bov spring was set to soft and was leaking boost.

 

yeah I have the same problem right now, welcome to the club.

 

My car did that for about 5 seconds, before I realized that it was an intercooler coupling that came off.

 

hey whats up when i first bought my 3rd gen it was doggy like that i replace all the vacuum lines and it still did it i checked all the line and intercooler pipe and then i rembered when i was doing my vacuum lines that there are pills in the lines coming off of the wastegates so id check there and if there not there or gone then replace them with holley carb jets mine runs great i dont remember whazt size i do so try that