Audi TT The Audi TT line, in both the coupe and roadster combines Audi's All Wheel Drive performance with the feel of a European sports car.

Loss of Boost

Old Oct 4, 2008 | 04:46 PM
  #1  
myxyzxo's Avatar
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Default Loss of Boost

Ok so after having my car fixed due to TB failure. I changed out the valves, had the head serviced. Car is running and the engine sounds good. But for some odd reason, no matter how hard I push it. I can't get pass 5psi on the boost gauge. I checked all the connection and they all seem to be in place.

Also due to the car having the battery post removed for 2 weeks. Now my automatic windows don't open and close with just 1 push. I have to hold the switch for it to open or close completely. Is there anyway to fix this?
 
Old Oct 4, 2008 | 05:19 PM
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^ vag-com should be able to fix the windows.


as for the boost... he car still in limp? maybe its time chip her =) ?
 
Old Oct 4, 2008 | 05:23 PM
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Is it limp?.. It runs smoother and everything. Just can't seem to get the boost pressure up. Sort of felt like I was driving a 6 speed civic.lol
 
Old Oct 4, 2008 | 06:04 PM
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If your not going above 5psi you either are in limp or they installed your vac lines backwards on your n75.

As for the windows:
Press down all the way, lift up, press down again
press up all the way, lift up, press up again.

You may need to do this once or twice and the window will be reset and one touch will work
 
Old Oct 4, 2008 | 06:44 PM
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tyvm cincyTT (for window instructions). I just drove the car a bit more, seems I do get 15-20 psi while driving local. On the freeway it's around 5 psi. Is this how it should be?
 
Old Oct 4, 2008 | 07:07 PM
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you probably not giving it as much throttle for the load so you only see a few psi. If you slowed down and then gave it basically wot, you may even see a small spike over your normal psi setting
 
Old Oct 6, 2008 | 01:50 AM
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Originally Posted by myxyzxo
Is it limp?.. It runs smoother and everything. Just can't seem to get the boost pressure up. Sort of felt like I was driving a 6 speed civic.lol
6 speed Civic, what's so bad about that? A very hi redline with built in shift light on the upper dash and a hoot to drive! The only ones in 6 speed are the Si's. Love my TT but my 08 coupe Si is a completely different type of car that is sooooo fun to drive! 8K shifts......that's too much fun. Too bad the power doesn't come until after the 6k mark.
 

Last edited by Mobius97; Oct 6, 2008 at 01:55 AM.
Old Oct 6, 2008 | 03:44 AM
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Yeah, I've been driving around my friends ls vtec prelude sh with Apexi controller for the last couple weeks while I am doing my build...vtec "kicks in" around 5400rpm and really seems like a mut...not too impressed with the vtec hype
 
Old Oct 6, 2008 | 12:25 PM
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Ok, driving the car to work this morning. Grrrrrr... When the engine is still cold I can get 10-15 psi. But once it's warmed up, I get no more than 5 psi. Another thing is when I am cruising my gauge should pressure gauge should be at 0. But here I am at -10 to -5 psi. My BoV isn't even as loud as before.

Edited: Just popped the hood, a wire that goes into the IM wasn't connected. Hopefully that should solve my lack of power.
 

Last edited by myxyzxo; Oct 6, 2008 at 12:34 PM.
Old Oct 6, 2008 | 01:09 PM
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have u checked the vac lines running to the n75?

get an MBC and just delete the n75 =P
 

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