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Boost not going past 1.1bar
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<blockquote data-quote="mengz" data-source="post: 1063719166" data-attributes="member: 8556"><p>Hi All,</p><p></p><p>i have a GDB version 8 subaru impreza wrx sti. my car has been boosting at 1.5bar all the while and suddenly 1 day, it just didn't boost pass 1.1bar. it does not spike, it does not creep, it just holds steady at 1.1bar and refuses to go up.</p><p></p><p>thought my boost meter faulty, had the car on the dyno at APD and it shows the same 1.1bar max as well.</p><p></p><p>Below are the diagnostics done:</p><p>1. check wastegate diaphragm, no leak. wastegate is able to hold.</p><p>2. bypass oem boost solenoid, boost still wouldn't go pass 1.1bar.</p><p></p><p>replaced intercooler gaskets, bov gasket, downpipe gasket and a few gaskets here n there. still same prob. checked the turbine shaft, no freeplay.</p><p></p><p>mech is suspecting that the compressor fins might be damaged or worn out. hadn't had the turbo removed to really inspect though.</p><p></p><p>hope to get some feedback or advice here.</p><p></p><p>Thank you.</p></blockquote><p></p>
[QUOTE="mengz, post: 1063719166, member: 8556"] Hi All, i have a GDB version 8 subaru impreza wrx sti. my car has been boosting at 1.5bar all the while and suddenly 1 day, it just didn't boost pass 1.1bar. it does not spike, it does not creep, it just holds steady at 1.1bar and refuses to go up. thought my boost meter faulty, had the car on the dyno at APD and it shows the same 1.1bar max as well. Below are the diagnostics done: 1. check wastegate diaphragm, no leak. wastegate is able to hold. 2. bypass oem boost solenoid, boost still wouldn't go pass 1.1bar. replaced intercooler gaskets, bov gasket, downpipe gasket and a few gaskets here n there. still same prob. checked the turbine shaft, no freeplay. mech is suspecting that the compressor fins might be damaged or worn out. hadn't had the turbo removed to really inspect though. hope to get some feedback or advice here. Thank you. [/QUOTE]
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Boost not going past 1.1bar