P2P01 New Member 11 Member For: 6y 3m 10d Posted 30/01/18 05:30 AM Share Posted 30/01/18 05:30 AM Hi guys, Need some advice if possible. I was running around 16psi then swapped the boost gauge hose from the hose that links the turbo to the boost solenoid (autobahn fitted), to then re route to the hose from a top of the turbosmart bov. I did this because it wasn't showing any vac. Couple days later my boost dropped to 8-9psi!!! ?? Any idea why this could happen? The car has been remapped also. Link to comment Share on other sites More sharing options...
k31th less WHY; more WOT Site Developer 28,302 Member For: 16y 14d Gender: Male Location: Melbourne Posted 30/01/18 05:41 AM Share Posted 30/01/18 05:41 AM The boost gauge should be connected to a vacuum source (best is from intake manifold to the BOV, via a T-piece). The hose that goes from the turbo to the boost solenoid should be a single hose with nothing in the way. The other hose from the solenoid should go to the wastegate, again with nothing in the way. Link to comment Share on other sites More sharing options...
P2P01 New Member 11 Member For: 6y 3m 10d Posted 30/01/18 06:03 AM Author Share Posted 30/01/18 06:03 AM Yeah I have plumbed it off the bov now as you said. still unsure as to why it has dropped in psi though... Link to comment Share on other sites More sharing options...
k31th less WHY; more WOT Site Developer 28,302 Member For: 16y 14d Gender: Male Location: Melbourne Posted 30/01/18 06:30 AM Share Posted 30/01/18 06:30 AM either one of those hoses is not connected properly, or there's a boost leak. Link to comment Share on other sites More sharing options...
eff xr6t Member 569 Member For: 10y 6m 24d Posted 30/01/18 06:58 AM Share Posted 30/01/18 06:58 AM You are now seeing your intercooler pressure drop... Link to comment Share on other sites More sharing options...
k31th less WHY; more WOT Site Developer 28,302 Member For: 16y 14d Gender: Male Location: Melbourne Posted 30/01/18 07:03 AM Share Posted 30/01/18 07:03 AM that'd have to be a pretty horrible cooler to drop 7-8psi haha but yes, I'd call that a boost leak. Link to comment Share on other sites More sharing options...
P2P01 New Member 11 Member For: 6y 3m 10d Posted 30/01/18 08:36 AM Author Share Posted 30/01/18 08:36 AM Do I start with removing piping to check for cracks? Link to comment Share on other sites More sharing options...
k31th less WHY; more WOT Site Developer 28,302 Member For: 16y 14d Gender: Male Location: Melbourne Posted 30/01/18 08:38 AM Share Posted 30/01/18 08:38 AM Yep, I'd start by follow the piping from the turbo outlet to the throttle body and check for any air escaping or bad seals or cracks. Link to comment Share on other sites More sharing options...
arronm Dropping a turd Gold Donating Members 9,520 Member For: 16y 5m 28d Gender: Male Location: Perth Posted 30/01/18 09:32 AM Share Posted 30/01/18 09:32 AM 3 hours ago, P2P01 said: Yeah I have plumbed it off the bov now as you said. still unsure as to why it has dropped in psi though... Has the power dropped 1 Link to comment Share on other sites More sharing options...
P2P01 New Member 11 Member For: 6y 3m 10d Posted 30/01/18 09:35 AM Author Share Posted 30/01/18 09:35 AM Yeah sure has. Is there a common spot for pipes to crack? Link to comment Share on other sites More sharing options...
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