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Discussion Starter · #1 ·
Well, recently my dawes mbc is not holding boost.
It jumps to 15psi then drops to like 9-10psi.
I took the mbc to see if there was a problem with the car and there wasn't. It was boosting stock psi like it use to before the install of the mbc.

What can the cause of this be?
Could it be the spring?
How can i fix this?
 

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Discussion Starter · #3 ·
no, i just might by a new one.
Im looking for a company selling it cheaper then Dawes
 

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Dawes MBC's tend to fade over time. Stretch the spring out about a ¼ inch and try the mbc again. I’ve had to do this to mine when the boost started to drop.
 

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The spring in the Dawes is the softest spring I have seen in an MBC so not surprising that it fades over time. Look on MP's site for MBC's, SMBC's and MBC+A's. They all are cheaper than Dawes. Same MBC but made to fit saab's larger ID hoses.
 
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