S4 / RS4 (B5 Platform) Discussion Discussion forum for the B5 Audi S4 & RS4 produced from 1998-2002

considering returning Forge valves as it seems batch 2 is also sticking...

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Old 04-24-2001, 06:50 AM
  #11  
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True.....but it wasn't cool lastnight. Plus, sitting in rush hour traffic doesn't cool very much.
Old 04-24-2001, 06:56 AM
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Default You are correct. But there is one thing that none of us know,

if they are functioning properly when they are in the car. That's fact. Yes, the car will compensate for a leak and still reach the desired boost level...BUT, it will lag for a second if there is a leak.

Here's a question I have for everyboby.....Does anyone know exactly how the system works? What I mean is, what exactly does the car do when it decides to bleed the boost.
Old 04-24-2001, 07:01 AM
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can u stir-fry the valves?
Old 04-24-2001, 07:07 AM
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I think I'll flame broil mine tonight, Whopper style baby!!
Old 04-24-2001, 07:12 AM
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Default Just installed my replacements last night. Seemed better.

I plan to drive the car tonight and then take them out when they're still warm. If they're sticking like the first batch did, I'll ask for my money back too.

Cold they seemed a lot smoother than the first batch.
Old 04-24-2001, 07:15 AM
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You really need to sort this out soon - good luck.
Old 04-24-2001, 07:35 AM
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Default The fact is they stick open, how scientific must you get ? Unless someone comes out and proves

that they SHOULD stick, then it's wrong.
Old 04-24-2001, 08:28 AM
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Peter & Mark, please find out what the problem is and tell all of us in this forum!
Old 04-24-2001, 08:29 AM
  #19  
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It uses the pressure sensor on top of the TBB to determine boost level
Old 04-24-2001, 09:18 AM
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Default I'm not sure what your really asking.....

When you let off the throttle, the throttle plate blocks off anymore boost going to the engine and the engine creates a higher vacuum. That vacuum in connected to the signal line of the bpv which then pulls the piston open. When the piston opens, it bleeds the charge air. Is that what you were asking? I can write a more thorough/clearer explanation, if you'd like.


Quick Reply: considering returning Forge valves as it seems batch 2 is also sticking...



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