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Hey everyone. My r32 gtst 4dr the other day started momentarily struggling on boosting, it would hesitate and make a deep whoofh air sounding noise or something for a second, then a day later it stopped creating boost all together(creates maybe 1psi instead of 10). There were no exhaust leaks arround the turbo from what i could tell and all the intercooler piping was tight. When i took the cross over pipe out though there was a bit of oil in the bottom, someone told me that was normal?. I took the turbo to a turbo shop and they said it looked fine. Any suggestions would be appreciated.

cheers

Edited by tstg23r
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https://www.sau.com.au/forums/topic/95453-gtst-no-boost/
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Good idea bout the BOV.

A friend of mine had an RB20DET which stopped producing full boost and it ended up being a partly blocked CAT. The insides had melted/ broken apart and formed a fairly solid blockage. Replaced it and all was fine, could also gut it but not as legal. Could be worth pulling it off for a quick check if nothing else seems to work.

If the turbo was standard then I would say it could be a bent turbo shaft. Have seen that also and the series one turbo has a black plastic compressor wheel which made a weird siren like noise as it span up and hit the compressor housing.

Anyway, Good luck with your problem

Edited by Fry_33
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https://www.sau.com.au/forums/topic/95453-gtst-no-boost/#findComment-1746231
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