[Biturbos4] boost problems w/ apr chip

Wilson Northrup northrup at crazybug.com
Tue Feb 19 18:38:01 PST 2008

while it's not likely, you could check with another gauge or vag-com.

If you continue to be limited to 12psi, it may be a leak.   If you 
continue to  push the limits of your boost and only make 12 psi, and have 
a leak, you may be in for an expensive repair.

perhaps it's time to do a smoke test.

On Tue, 19 Feb 2008, Shaun Blair wrote:

> i replaced the maf and it runs a little better but it acuall it ran
> fine before, just a little rich.  my boost gauge is still reading
> around 12 psi.  i need to keep trying to figure out why im not hitting
> 18 psi
> thanks,  shaun
>> CC: speedracer.mark at gmail.com; quickaudi at gmail.com; biturbos4 at www.audifans.com
>> From: glenahan at vfemail.net
>> Subject: Re: [Biturbos4] boost problems w/ apr chip
>> Date: Sun, 17 Feb 2008 10:00:09 -0500
>> To: shaun_blair at hotmail.com
>> 1. Clean the MAF before you spend big bucks. $3 of gummout can go a
>> long way
>> 2. Put a pressure guage on the system. I'm not sure where a
>> convenient poitn is to tap in, but I bet alldata does
>> G
>> On Feb 17, 2008, at 9:52 AM, Shaun Blair wrote:
>>> i did just find out i have a bad maf. im going to replace it monday
>>> and see if it changes my boost readings.  also how do i know if the
>>> 12 psi reading is accurate maybe im actually hitting higher and the
>>> boost gauge just isnt accurate.
>>> thank again,  shaun
>>> Date: Sat, 16 Feb 2008 23:51:04 -0500
>>> From: speedracer.mark at gmail.com
>>> To: shaun_blair at hotmail.com
>>> Subject: Re: [Biturbos4] Annoying Issues with 2001 S4 6-spd
>>> CC: quickaudi at gmail.com; biturbos4 at www.audifans.com
>>> You have to break down the problem to mechanical or electrical.  Is
>>> the computer holding the boost back, and if so... why?
>>> Is there a physical issue (boost leak, failing turbo, bad sensor,
>>> etc.)?
>>> Check for faults.  Make or buy (AWE sells them) a kit to pressurize
>>> the system and check for leaks.  A smoke machine helps here, too.
>>> It sounds as if your car is fairly modified.  Increasing the boost
>>> pressures increases the likelyhood of a failure (leaks, etc.), so
>>> an experienced methodical approach is necessary.  Don't take
>>> anything for granted!
>>> This isn't something you can diagnose over the internet... we can
>>> only give you procedural suggestions.
>>> Good luck,
>>> Mark Rosenkrantz
>>> On Feb 16, 2008 10:07 PM, Shaun Blair <shaun_blair at hotmail.com> wrote:
>>> audi gearheads, can you help me, im having
>>> boost problems and i dont know if i have a leak or if my boost
>>> gauge isnt reading propery. i have a
>>> boost gauge reading ablout 12 psi at most how do i fix this, do i have
>>> a mechanic check the TB boost and if so how does he do that. im very
>>> lost please help  you can emailme if u want shaun_blair at hotmail.com
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