lambda/O2 sensors, ECU, & simulators

[Mitsuru]

Here is the problem which I will need a little help on.
I have a replacement ECU for my V6 engine swap from a Dodge Intrepid.
The Dodge Intrepid didn't come with the security protocols/systems which
the Voyager did. Although both vehicles used the same engine there is a
slight difference.

The Intrepid's V6 is mounted front to back and has 2 upstream heated
oxygen sensors on the manifolds, and two down stream sensors as it has
two exhaust pipes the full length of the car on for each bank of
cylinders.

Where as the Voyager has one upstream and one down stream, as both banks
of the cylinder heads share one exhaust pipe front to back with the engine
being mounted transversely.

So here are the questions
Can you use one sensor, but connect it to two sensor inputs on the ecu?
Remember this would need to be done for both up and down stream sensors.

I have had one reply on the neons forum but he was unsure about his answer.

I don't know if the signal is strong enough to split.
It's only 1v max and barely any current.

If it's not possible then what would be the alternative?

[TerryG]

I have "bodged" the left and right bank lamdas on rover v8s before and it has worked but they use a different type of sensor. You won't break a sensor by connecting it to both inputs on your ECU but it may not work.
They are very low voltage and almost no current as your friend says but there is also hardly any draw on them.
You will have the aditional complication of having an LPG kit that will require to be connected to the Lambda (if you have an old analogue system that doesn't need to be then it is time for an upgrade)

[Mitsuru]

Thanks Terry, I was planning on a brand new LPG kit anyway as the
old front end kit was only suitable for a four pot. At least now I do
have a feasible back up plan.

But it does raise the question for those retro fitting a modern engine
or just a modern fuel system into an older vehicle.

If you can combine the sensors for those up stream of where there
would be a catalytic converter. What would you do for the down
stream sensor(s). Especially for those vehicles that don't have a cat
fitted, but still require sensor input or information.

I did a bit of checking on the bay of E, and there was a few of these
listed with the following info in the description.





http://www.ebay.co.uk/itm/320983822312? ... 1436.l2648

http://www.ebay.co.uk/itm/290779033592? ... 1436.l2649

Do you have a 1996 to present vehicle and installed a Hi-flow cat, header
or test pipe?

You'll most likely get a check engine light code P0420 or P0430 due to
added exhaust flow which puts your car into limp mode; your car will be
running slower and wastes more gas!!

Our Angle spacer is a perfect solution for you!! It will gap out your down
stream o2 sensor away from the added exhaust flow / heat. Allow your
o2 sensor and ECU to get a correct reading

Has anybody tested this out, to see if it actually works?
Or is it theory correct but in practice, it's a waste of time!