the .4 to .7 volts warmed up and at 2K rpm shows that the 02 sensor is
working ..
like medium all right.
a wider swing range would be better..
but it's not dead ..
or badly lazy.

the engine 'stalling out' at 2 minutes of running ...
what's that about ?
do you have a tachometer in the dash ?

is it a 'fast/hard' shut off ..
or a slowish  soft one ?

got a fuel pressure tester ?
Rarer that that's off ...but I have found vans with fuel pressure problems,
fuel pick-up problems..
and water in the fuel.

what do the spark plugs look like ?

Scott

----- Original Message -----
From: "John Lauterbach" <jhlauterbach@BELLSOUTH.NET>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Thursday, December 22, 2011 1:48 PM
Subject: O2-sensor results with digital voltmenter

> Here are the results from voltage test.
>
> Voltmeter +-lead connected to lead from O2-sensor, -lead on bumper.
> Engine not run for three hours and  O2-sensor not connected to lead to
> ECU
>
> 0 volts from 0 to 120 seconds
>
> 0.13 volts at 150 seconds
>
> 0.53 volts at 180 seconds
>
> 0.30 volts at 210 seconds
>
> engine stalls out at 240 seconds
>
> connected O2-sensor to lead to ECU
>
> restarted engine
>
> 0.45 to 0.55 volts
>
> 0.6 to 0.8 volts after engine at temperature and engine at about 2000
> rpm
>
> 0.4 to 0.7 volts with rapid change within that range with engine at idle
>
>
> Any thoughts on good or bad?
>
> John