weird readings on bar gauge

[Ameer Antar]

It could be a leaky line, but I doubt it since the readings are really
strange. If it was leaking, you would get higher than normal readings, say
.5-.6 bar, b/c air is leaking into the line. At boost, it would read
slightly lower than actual boost, b/c air is leaking out of the line. Since
you're readings are the opposite, I'd think it's something electrical,
although you should check all of the vac lines including those to the
wastegate and the intake hoses on the turbo and air flow meter. It's very
common to have small leaks in these cars, and together, they can add up and
cause poor running. I would check for good connections from the ECU to the
boost gauge. Also make sure both have good power and ground lines. Once
you're certain about that, maybe try swapping in another ECU or boost
gauge, b/c either one could be flaking out. good luck, and let us know what
happens.

-Ameer


At 10:10 PM 9/20/2002, you wrote:


>Date: Fri, 20 Sep 2002 14:14:46 -0700 (PDT)
>From: Ron Wainwright <ron_01056 at yahoo.com>
>Subject: weird readings on bar gauge
>To: quattro at audifans.com
>
>   Liosters,
>
>   I'm having weird readings again in my 90 200tqa
>  the bar indicator shows 0.0, 0.1 at times while at a
>stop light and show 1.5 or 6 bar while under a heavy
>foot
>  but at times it will show rite 0.3 at a stop light
>and 1.9/2.0 bar under a heavy foot
>i've had this problem a little while back and really
>didn't get much info one lister suggested that water
>was gettin inside there but I checked and none was
>preseant and it hasn't raind hear
>so i ask whats going on split in the hose that goes to
>the ECU/manifold?
>  I have a stage II intended acceleration chip and 2.0
>bar spring
>  Any help out ter?
>Thanks
>Ron
>90 200tqa IA stageII,2.0 bar, 20v rear brake upgrade
>
>__________________________________________________
>Do you Yahoo!?
>New DSL Internet Access from SBC & Yahoo!
>http://sbc.yahoo.com
>
>--__--__--