MSefi.com read only forum (Jan.15,2018)

Installing MSII V3.0 into a '91 Range Rover 3.9. Has anyone had any luck using the stock O2 sensors? Apparently Rover uses a sensor based on a "titania" element instead of the usual "zirconia". This material generates a variable resistance instead of a voltage. The resulting voltage slope is also reversed to the normal Narrow Band sensor. And, just to make it a little more difficult to swap to another sensor, they use a non-standard thread, as well!

A little more info on the Rover EFI here (near the bottom of the page):
http://www.britishv8.org/Articles/Rover-14CUX-EFI.htm

I have tried (without success, so far) to set up parameters in Megatune for a generic WB.

Thanks in advance!
Bill

Hi.. I have exactly the same question.... does anyone know how (or if) this is possible??

Many thanks

Hi.. I have exactly the same question.... does anyone know how (or if) this is possible??

Many thanks

Hi, Linz. Thanks for joining in.

I will probably end up just using an LC-1 WB, and bypass the stock sensors.

If I get energetic, I am thinking of installing a WB sensor alongside of the stock sensor, and using an accurate multi-meter to measure the resistance of the stock sensors against a known (from the LC-1) A/F ratio. From there, it "shouldn't" be too hard to build a circuit to extract a voltage to program into the MSII.

The next step is to put a 4.2 from a '94 RR into a Triumph TR8, so being able to use the stock sensors could knock a few $ off the cost of that project!

Unfortunately, I have a couple of other projects in front of this one, so it will probably be several weeks before I get to play with it.

Cheers
Bill

Don’t waste your time trying to use the original sensor, Just weld in an M18x1.5mm bung and fit an LC1 wideband (or narrow band if you must )

eliotmansfield wrote:Don’t waste your time trying to use the original sensor, Just weld in an M18x1.5mm bung and fit an LC1 wideband (or narrow band if you must )

That is most likely what I will do, but where is the adventure in that?

Cheers
Bill

Even if you do figure it out, all you will end up with is a narrowband lambda – which is far from ideal anyway. Don’t think I would want to risk my engine (through going lean) for the sake not using a common lambda sensor.