Matt,

With the O2 sensor disconnected the engine runs fine and the Digitool 
shows a constant 0.40.

The guitar cable sounds interesting.  Are you talking about the same 
cable I use between my Strat and the amp or the shielded cable one 
might find inside say a PRS or Les Paul?

Chuck
'85 Wolfsburg Westy - 'Roland the Road Buffalo'

> Hey Chuck,
> ��� I have a 88GL with a Digifant, but I have a feeling we may have 
> the same
> trouble.
> ��� I was crippled by it once before- no power, running rich, bucking 
> etc.,
> and replaced way too many parts before finding out it was a short in 
> that
> green wire.� Got nailed again over the holidays in VT in the rain, and
> finally replaced that wire with a guitar/instrument cable. It's been 
> fine
> ever since. Basically the same kind of wire- current on the inside, 
> shield
> on the out, but much more robustly built. I ran it from the ECU 
> connector
> along the outside of the loom to the engine bay.
>
> ��� Regardless of all my D.I.Y. nonsense, and looking at page 24.20 in 
> the
> Bentley (for Digijet now): Check the ECU connector at pins 5 and 7(5 
> is the
> current and 7 is the ground it seems). If there is ANY continuity 
> between
> the two, even with the O2 sensor disconnected at the tailpipe, the ECU 
> will
> freak out, and make the van run bad-to-worse. Why the ECU should care 
> when
> the sensor is disconnected, I have no idea. But as soon as I cut that 
> wire
> right at the base of the ECU connector, the van ran fine, albeit in 
> Open
> Loop mode. I put in the new cable when I got home.
>
> ��� Good luck.
>
> -Matt Sutton
> 88GL
>
>
>