TT (Mk1) Discussion Discussion forum for the Mk1 Audi TT Coupe & Roadster produced from 2000-2006

messing with boost machine

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Old Sep 12, 2007 | 10:23 AM
  #1  
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Default messing with boost machine

I have a boost machine that i recently installed after finally putting in a boost gauge, I messed with it for a little but coudl not get the spikes over 20psi. i know that i shouldnt go over that anyway, but i wanted to see how the car would feel at that boost. no matter what i set the BM at, i could not see more than 20psi...no CEL and the car feels fine, but i cant seem to get the car to hold at 21psi like it had done in the past...cant even spike at 21. I also dont seem to be capable of holding boost, tapers off to about 15ish?already changed the MAF..possibly boost leak? nothing comes up on teh VAG..TIA
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Old Sep 12, 2007 | 10:25 AM
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Default Don't try to adjust too much too fast...>

Zero it out again and start over following the tuning notes.. You may have another faulty sensor limiting boost..

Measure boost in 3rd gear. Expecting it to "hold" at 21 is a bit optimistic..<ul><li><a href="http://www.modshack.info/bminstall.htm">Instructions</a></li></ul>
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Old Sep 12, 2007 | 11:18 AM
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Default and sometimes the valve needs reset

i have to do mine once in a while...full out -&gt; full in -&gt; re-adjust.
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Old Sep 12, 2007 | 12:03 PM
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Could that faulty sensor attribute a hesitation/bogging going from 3k to 4k in WOT?
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Old Sep 12, 2007 | 12:39 PM
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Default Often the symptoms of...>

a Bad Temp sensor...

Also hows the MAF?
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Old Sep 12, 2007 | 01:16 PM
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You said the M-word
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Old Sep 12, 2007 | 01:42 PM
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Default Gasp!....>

Guess what...he C car has the M thing too....:-)

<img src="http://images28.fotki.com/v988/photos/7/7305/5229677/IMG_1564-vi.jpg">
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Old Sep 12, 2007 | 01:58 PM
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You can't get away that easy
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