87 GN Boost Problem

[blmstl]

New to the forum and GN's so here goes.
The car starts and runs great. When it was cold 45-55 degrees it ran to 15+ lbs of boost and ran hard. Now it goes to 5lbs of boost, makes a loud whoosing noise and falls flat. Can anyone tell me where to start looking.
Car has 45K miles, KB dash, bigger injectors, KB intercooler, adjst fuel reg, cold air kit, underdrive pulley. Im in the St Charles MO area.
Thanks,
Bruce

 

[83ttypecooled]

HI,
Is something loose? Like maybe your up pipe? Or, did you come into contact with something that punctured the intercooler? Take a close look at the pressured part of your system, it must be something simple.I would guess one of the coupling hoses has blown off. Good luck with your trouble!

 

[1986TR]

+1 on the turbo to throtle body hoses double check all hoses:biggrin: