[200q20v] Low boost (1.7) and Hesitation under load (4000 rpm+)

[Claus Vegener]

Please note:
The standard 200 20V have a 2.0 Bar boost sensor and
1.7 - 1.8 is normal readings for that.
The IA stage 3 and many other, have a 2.5 Bar boost sensor.
A 2 Bar boost sensor gives a electrical output signal to the ECU
(and the built in dash display) of 5.0 Voltage for 2 Bar of abs. boost.
A 2.5 bar gives a 5.0 Volt for 2.5 Bar abs
And a 3 Bar 5.0 Volt for 3.0 Bar abs. etc.
If the ECU is chipped with another boost sensor, the readout
have to be ree-calculated - or mount a mecanical gauge!

Claus Vegener
200 q 20V Avant 
(IA Stage V 3 Bar)

----- Original Message ----- 
From: "Noelle Beaudin" <nobeau at tcnow.com>
To: "Kneale Brownson" <knotnook at traverse.com>
Cc: <200q20v at audifans.com>
Sent: Tuesday, August 28, 2001 3:21 AM
Subject: Re: [200q20v] Low boost (1.7) and Hesitation under load (4000 rpm+)


> >Kneale wrote:
> >1.7 is stock.  I assumed with his posting that he had a chip/mod. 
> >Otherwise he's been running overboost.
> 
> I've got a chipped 2ctq20v avant with the exact same problems as 
> described by Shawn.  I personally have never even seen the car reach 
> 1.7 or above.  The upgrade is an IA Stage 3 that was done in 1998. 
> When I talked to Ned from IA he suggested that the hose that runs 
> behind the heat shield by the wastegate could have burned through and 
> that I replace it.  Of course, not that I've done this yet to see if 
> it makes any difference.  However, I did notice that there is a new 
> O2 sensor that was patched in (I just bought this car 6 weeks 
> ago)...so - as with Shawn's example I am now wondering if this could 
> be the problem, or part of the problem as well.  Any help for both 
> Shawn and now me would be great.
> 
> --
> nkb
> '86 5ktq
> '91 2ctq20v
> 
> -- 
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