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Jan 17, 2009 | 03:52 PM

mcp0301

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Audiworld Junior Member

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Boost problems

I have a 225 tt with an apr tune and r1 dv. However sometimes i boost 21 psi and sometimes i cant get above 15 for some reason...... the hoses are fine, what could be the problem?

Jan 18, 2009 | 01:19 AM

TTransport

AudiWorld Senior Member

Joined: Sep 2004

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From: Round Rock TX

climate changes, vac hoses, sensor problems,

do you have any codes, do you have a manual boost controller, have you pressure tested it?

Jan 18, 2009 | 07:12 AM

TTinCT

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noted below are great questions, but also what gear are you in???>>>

taller gears = higher boost numbers....

Jan 20, 2009 | 09:52 AM

mcp0301

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Re: climate changes, vac hoses, sensor problems,

i have reached 20 psi many times in all gears, this problem is not gear specific. i do not have a boost controller and i am not throwing any codes. i have not gotten it preasure tested, how much would that run me. A friend of mine told me it could be my n75 valve but i do know much about that subject.

Jan 20, 2009 | 10:44 AM

TTinCT

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if you are over 20psi in first gear on a stock turbo>>>

i would say that is abnormal.

Overboosting can be due to a bad waste gate or vacuum leak....

If you call APR, they will confirm what boost numbers should be in each gear...