|> Looked around underneath and found one O2 sensor between the cat and |> the engine, and one after the cat, toward the rear of the van. |>
|> I've spent a lot of time online and with online vendors' help ppl and |> received somewhat contradictory information about what will do the |> job. |>
|> 2 questions: |>
|> 1/ Are there actually TWO O2 sensors between the cat and the engine - |> vendors' sites seem to suggest this - saying "2 required" ? As above, |> I saw only one [towards the passenger side] but wasn't looking for a |> 2nd one at the time. | |There is one O2 sensor per bank between the cat and the engine. On a V-6 |engine with 2 banks, you would have 2 O2 sensors before the cat.
I read that to mean that besides the Air/Fuel sensor [ which is very visable] on the exhaust manifold close to the radiator there is an O2 sensor somewhere on that manifold or whatever it becomes on its way to the cat, that I have not yet discovered - will look when wife returns home with the van. Thanks. Info on Bosch universals below.
| |>
|> 2/ I am a electronics buff and ham-radio operator who would have no |> trouble doing the cut and splice wiring job required to install the |> much less expensive Bosch Universal sensor[s]. Does anyone know if |> they will work with the Calif. emissions engine ? |>
|> TIA, QE in NJ | |I have no experience with Bosch universal sensors so I can't comment |on how they work, but if you are going to try one, I suggest cutting |the pigtail off of the old sensor and splice it to the new sensor so |that you don't mess with the harness to the ECU. You then have the |option of going back to a factory O2 sensor without any problems.
Not having seen one, you guessed it anyway :-) !! That's exactly how they work. Here's a link to the installation guide for Bosch Universals, which sell online for less than $70 delivered.
formatting link
QE