'91 200 20V TQ Dies on Freeway - Now Won't Start

[Claus Vegener]

So many errors at the same time - guess a ground connection.
Check the 2 ones at the IM
Claus
----- Original Message ----- 
From: "Michael Palatas" <mpalat at gmail.com>
To: <200q20v at audifans.com>
Sent: Sunday, December 14, 2008 1:49 AM
Subject: '91 200 20V TQ Dies on Freeway - Now Won't Start


> It was a dark and stormy night....  My "4 month owned", IA Stage III
> chipped, '91 200 20V TQ was running fine on the freeway at 70mph yesterday
> when it started to shudder a bit and lose speed.  Pressed harder on the
> accelerator - no response.  Had some slight, unusual vibration you could
> feel in the steering wheel - almost like the engine misfiring - as it
> coasted down to a stop.  Electrical indications normal.  Wouldn't restart.
> Checked the fuel pump fuse - OK - so flatbed towed it home ($130).
>
> Tried to restart.  Strong crank, but rough/unusual vibration as the engine
> turned. Checked the following:
>
> Fuel Pump Relay OK
> 12V at fuel pump connector
> Fuel pump running during crank.
> Pressure/fuel at fuel filter outlet
> Distributor turns when cranked (but did find the wide tipped rotor - will
> replace soonest).
> Good spark on high tension wire.
>
> Hooked up VAGCOM, cranked for about 5 seconds, and had the following code
> readouts (and only these):
>
> "00519 - IM Pressure Sensor (G71)
>            06-00  :  Signal too high
> ___________________________________
> 00523 - Intake Air Temperature Sensor (G42)
>           30-10  :  Open or Short to Plus / Intermittent
> ___________________________________
> 65535 - Internal Control Module Memory Error
>            00-00
> ___________________________________
> 00537 - Lambda (Oxygen Sensor) Regulation
>            08-10  :  Control Limit Surpassed / Intermittent
> ___________________________________
> 00525 - Oxygen Sensor (G39)
>            29-00  :  Short to ground
> ___________________________________
> 00513 - Engine Speed Sensor (G28)
>            27-10  :  Implausible Signal / Intermittent
>
> Readiness:  N/A"
>
> Any ideas/suggestions?  None of the codes sound too ominous to me, but I 
> am
> not a code expert.  Not sure why I would have the Oxygen Sensor faults -
> just put in a new one about 2 months ago - car ran fine after that
> replacement till now.
>
> Mike in North Hollywood, CA
> _______________________________________________
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