I recently bought the splice in type. I had it installed by a mechanic
at the time other work was being done. Immediately upon starting up and
driving away, it started stumbling and bumbling. It was late, and I just
stopped and unplugged the thing. I fighured it was the splice, and sure
enough, when I got to it, I found it WAS the splice.

I went and got me some "knife" connectors or knife disconnects as they
are sometimes called. They are a crimp-on device with a blade that has a
hook on the end. You put two of these together blade to blade and hook
to hook and give them a little twist and the hook of one locks over the
blade of the other, making a very powerful connection impossible to pull
apart. The connector will pull loose from the wire before the connectors
separate from each other. I used a proper crimping tool to crimp the
connector onto the wires. Nothing like the right tool for the right job.
I slipped a piece of heat shrink tubing down over each wire before
connecting the connectors together, then pulled it back up over the
exposed metal of the connectors. I heated it up and shrunk the tubing
tight to the connectors. At the ends of the tubing, I smeared on a bit
of silicon sealer to make it water tight. I got in my van, started her
up, no more stumbling and bumbling. Change out for the next O2 sensor
will now be easy.

John Rodgers
88 GL Driver
Jeffrey Vickers wrote:
> I've been getting stumbling/missing between 3 and 4K rpm so I
> disconnected my O2 sensor and it seems to have cured the problem.
> What's the consensus on a new sensor? Bite the bullet and go with and
> OEM unit or get the generic and splice in the plug?
>
> Jeff
> 87 Syncro Westy
>