Did you use OEM O2 sensor? On my 84 Westy with a 91 Jetta 1.8. I used a
cheep universal sensor and three weeks later the van ran so rich that
unburned fuel came out the tail pipe and I could only get to 30 MPH. After
paying the extra for the OEM Bosch sensor it's ran great.

Andrew
1984 Westy "Speed Bump"
1996 VW Jetta Trek  "Little Beep" (the wife's car)

----- Original Message -----
From: "Chad G" <groch@WORLDCHAT.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Saturday, October 20, 2001 7:22 PM
Subject: O2 Sensor Woes

> I've been experiencing BRUTAL gas mileage for a while now.  Many people on
> the list pointed to the O2 sensor.  It's been replaced twice in 6 months.
> I've noticed that the van runs beautifully when the O2 sensor is
> disconnected.  When connected it occasionally hesitates, stumbles, loses
> power, etc.  Also, when I drive over rough pavement or hit a big bump the
> engine stumbles.  I'm thinking this isn't the sensor but rather the green
> wire that connects the sensor to the ECU.  Any opinions??  How easy is it
to
> change this wire??
>
> thanks
> Chad 85GL
>