Did you check for proper operation of the idle and full throttle switches?
Also, the fuel injector wiring comes together in the harness near the
thermostat housing.  Make sure the connections are not corroded or
intermittent.  I had to cut out the whole mess and splice in new wiring on
my 89.
TEMiller

----- Original Message -----
From: "Christopher Gronski" <gronski@GMAIL.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Monday, August 08, 2005 8:58 AM
Subject: o2 Sensor on 2.1L

Hi All,

Last week I reported an interbucking problem, well Well I thought I
had it solved. I went into the engine compartment and traced the three
wires (there are three right?) that come out of the o2 wire that leads
from the cat. All of them were disconnected.

Two of the wires, both white, were disconnected at the plug. The plug
was very difficult to reconnect. I actually had to put a tie wrap on
it to get it to stay together. I recognize that there could be a
problem with the connection here. The other wire, the green (a
ground?), was also disconnected.

I reconnected them but I'm still getting the bucking. Any thoughts?
Could the fact that these were all disconnected have gummed something
else up?

Chris