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Won't go past 20PSI

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Old Jul 22, 2017, 08:50 AM
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Question Won't go past 20PSI
kinda funny story, I used to have a leaking mechanical boost gauge
With my hallman mbc where it's set at, It used to read 23psi.

Yesterday got a decent electrical boost gauge and it wont do anything more than 20psi
However much i turn the boost up, it only does 20psi.

It's not the new gauge with the problem coz it reads past 20psi in a friends car.

What could be the problem, where do I start troubleshooting?
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Old Jul 22, 2017, 09:28 AM
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If you turn down the boost controller all the way is it still 20 psi? Could be the waste gate actuator arm might need more preload.
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Old Jul 22, 2017, 09:36 AM
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What brand Electrical Boost Gauge is it?
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Old Jul 22, 2017, 04:44 PM
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Boost leak test first!
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Old Jul 23, 2017, 04:28 AM
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Originally Posted by 4b11slayer
If you turn down the boost controller all the way is it still 20 psi? Could be the waste gate actuator arm might need more preload.
it works when i turn it down. I have currently set it at 18psi coz dont know what 20psi is 😩
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Old Jul 23, 2017, 04:28 AM
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Originally Posted by AWDSeven
What brand Electrical Boost Gauge is it?
Prosport jdm series 52mm electrical boost gauge.
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Old Jul 23, 2017, 04:29 AM
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Originally Posted by 4G63_EVO
Boost leak test first!
Im waiting for some turboxs intercooler piping to arrive.. then i do the boost leak test as well as a compression test.
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Old Aug 22, 2017, 11:38 AM
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Just updating the thread,,
I got a full set of turboXS ic piping at a very good price and this fixed the problem.

so there was probably a boost leak or many boost leaks on the stock piping.

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