FiftyOne Bronze Donating Members 1,145 Member For: 11y 5m 16d Gender: Male Posted 03/03/14 10:04 AM Share Posted 03/03/14 10:04 AM Could have just had a moment & set it to safe mode? ECU reset maybe? Link to comment Share on other sites More sharing options...
TomT Spooling Member Donating Members 961 Member For: 13y 11d Gender: Male Location: Blue Mountains, NSW Posted 03/03/14 10:29 PM Share Posted 03/03/14 10:29 PM Check the wastegate actuator arm, mine popped off once, just a circlip, same kinda thing boost guage would hit around 0 but feel no boost. Link to comment Share on other sites More sharing options...
bogan247 New Member 6 Member For: 10y 10m 25d Posted 04/03/14 06:51 PM Author Share Posted 04/03/14 06:51 PM Thanks for all the suggestions :o)found the waste gate has packed it in. How much PSI can the factory ons handle? Link to comment Share on other sites More sharing options...
discostig Manual mode ________________________ All day, erryday Donating Members 13,798 Member For: 17y 23d Gender: Male Location: Probably above atmospheric pressure Posted 05/03/14 05:07 AM Share Posted 05/03/14 05:07 AM (edited) Well mine's stock (B series) and has been seeing a 15PSI tune for a number of years now. Turbo is 4 years old and has done about 125,000km (was replaced under warranty just before I modified the car). Edited 05/03/14 05:07 AM by -SteveR- 1 Link to comment Share on other sites More sharing options...
rollex Member 683 Member For: 10y 6m 9d Gender: Male Location: Australia Posted 01/05/17 01:54 AM Share Posted 01/05/17 01:54 AM (edited) I've got a boost leak on my BF manual. I've checked all the turbo piping, removed them all and checked for splits. Checked the boost tee fittings everything looks ok. I get a really loud air leaking noise that sounds almost like a belt slipping, doesn't happen until about 3k on full boost and the torque just never comes, feels like its making about 6psi though haven't had a chance to datalog and see what boost its actually making. No DTC fault codes. Exhaust note is normal and it still makes a good 6-8psi so I don't think the wastegate has stuck open. Turbo spins freely with a normal amount of oil in the intake. Any other fittings that tend to fail I should be checking? All the major intake pipes seem fine so I'm assuming its either the boost controller has failed (fairly sure that should throw a DTC) or some vac line somewhere has failed. I'm trying to get hold of a smoke tester to pressure test the entire intake but just want some ideas of common points of failure first. Cheers Edited 01/05/17 01:56 AM by rollex Link to comment Share on other sites More sharing options...
arronm Dropping a turd Gold Donating Members 9,520 Member For: 17y 1m 21d Gender: Male Location: Perth Posted 01/05/17 01:58 AM Share Posted 01/05/17 01:58 AM Is the turbo hanging off the exhaust manifold. Have you checked the studs Link to comment Share on other sites More sharing options...
rollex Member 683 Member For: 10y 6m 9d Gender: Male Location: Australia Posted 01/05/17 02:02 AM Share Posted 01/05/17 02:02 AM Gasket failed and I replaced the studs and gasket about a year ago now. I would imagine a leak bad enough to stop boost building would be quite loud, this is loud but nothing like when the gasket failed. Link to comment Share on other sites More sharing options...
Puffwagon Puff Gold Donating Members 15,972 Member For: 9y 10m 18d Gender: Male Location: South Australia Posted 01/05/17 04:03 AM Share Posted 01/05/17 04:03 AM You can hear a leaking flange noise when the turbo loosens up enough from the manifold. I would check it but I don't think that is the issue. It sounds like a loose clamp on the cooler piping. Sometimes when clamps are flogged out they will feel like they are tight but they will still be loose cos they're bent internally. The air leaking past a clamp makes a squealing noise sometimes. Just something to check anyway. Link to comment Share on other sites More sharing options...
rollex Member 683 Member For: 10y 6m 9d Gender: Male Location: Australia Posted 01/05/17 04:07 AM Share Posted 01/05/17 04:07 AM Yeah they look good but I guess there's no real way to see if they are sealing without pressurising it. Will take it down the road and put it on the dyno and stick my head in the engine bay, might be easier as no one seems to have a smoke tester available. Link to comment Share on other sites More sharing options...
Puffwagon Puff Gold Donating Members 15,972 Member For: 9y 10m 18d Gender: Male Location: South Australia Posted 01/05/17 04:13 AM Share Posted 01/05/17 04:13 AM You will see the silicone deform slightly as the clamp tightens. Also a stuffed clamp will often have the gear drive click or bend sideways as it is tightened. I haven't tried it myself but I have heard of hairspray being used as a glue to help it stay together and seal up. You should be able to narrow it down pretty quickly on a dyno though. 1 Link to comment Share on other sites More sharing options...
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