I just replaced the O2 sensor on my moms 1988 S15 Jimmy...the one down on the exhaust just after the Y pipe ahead of the cat.
The plug is in such a goofy place!! anyways, out came whatever was there and in went a new Bosch piece. The plugs were identical, and the vehicle side went into the new sensor side ok, and clicked positively when the tangs engaged.
BUT....there is still about 1/4" of the green weatherpack showing. The truck runs and drives much better, so there is obviously a good connection...but why would the weatherpack still show? is this common with aftermarket O2 sensors?
any ideas? should I muck with it until It is connected? I'm tempted just to run a new wire and make my own...
b