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.

Overboosting

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  #11  
Old 01-25-2009, 10:19 AM
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@ NeXeA500
I think it might be time for new plugs. that's what my car started doing and got progressively worse until I changed my plugs.
 
  #12  
Old 01-25-2009, 10:43 AM
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Really? hmm... perhaps. It seemd to get worse from right when I put in the N75 valve as the computer learned about more boost it just got worse and worse.. now when I try to even get on the throttle a little bit and build a little boost it will almost "miss" if you will...

I could try new plugs but first I'm gonna hook up vagcom and try to reset the ecu and make sure that doesnt fix it.
 
  #13  
Old 01-26-2009, 06:52 PM
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Ok, I disconnected the N75 valve and put in a MBC the turboxs hpbc one. Would not having feed back from the valve mess up my ecu?

Would having the N75 and the MBC on cause problems? On the install booklet it said not to use two boost controllers.
 
  #14  
Old 01-26-2009, 06:57 PM
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you need the n75 to be plugged in electronically and the hpbc controlling boost.
 
  #15  
Old 01-26-2009, 07:05 PM
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sorry to be a newb and that I was unclear I did left the N75 plugged in electronically and also the intake part. I attached the hose from the Intercooler and the wastegate to the correct MBC input and output. I tunned it to 17psi and I am running on GIAC chip.

1) Does having the N75 and the MBC both connect cause problems? On the install booklet it said not to use two boost controllers.

2) Does not having pressure reading from the N75 cause problems to my car?

3) How much boost should I be adjusted to? The two adjustment noobs are coarse and fine...how do I adjust the bleed? Is there a good write up for that?

Thanks again for all your help!
 

Last edited by azncandyman; 01-26-2009 at 07:11 PM.
  #16  
Old 01-26-2009, 07:17 PM
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Running both like that doesnt cause any problems. You arent using 2 mbc, you are only controlling boost with one.

No, it just needs plugged in.

20psi +/-. The "fine" is the bleed, the "course" is ball and spring. Just adjust the bleed/fine to 20psi
 
  #17  
Old 01-27-2009, 08:18 PM
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My Car threw a EPC code today and power was cut. I restarted and it was fine again. Freaky....I am going to scan for codes when I get home today...
 
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