Talk Morgan Forums Morgan Sports Cars Maintenance & Servicing Replacement Lambda Sensors - Black Top Zetec 1.8

I have received the following from a member of the LM62 Register living in Florence and would be good to get some feedback..

I wonder if you or somebody of our group can shine some light for me regarding the Lambda probes. Unfortunately this has always been the weak part of my Morgan and I have to change them every one or two years.

In the Morgan there are two such probes as required by law since year 2000 if I am not wrong. They look a little different, the lower one (blue cable) being a little smaller than the green one (upper probe).

Reading the information found on internet it seems that all the probes with four wires (two white one black and one grey) provide the same signal 0-1 Volt. So why they are different?

The question arises from two facts:
1) the lambda probes I find in internet for Ford engine 1800 (zetec) are much cheaper than what a mechanic would make me pay in Italy,
2) the probes listed for sale do not make any difference for upper or lower and I cannot find anymore probes with green and blue wires covering as the original. (NOTE FROM MINIKEEFY - they are listed in UK though)

Moreover I run into some device to neutralize the signal from the probe to the electronics and also some fuel additive probe detergent. How good these are? anybody has tested?

Get a vintage morgan no lamda sensors or any other EU enforced controls just a raw engine!

Not too sure how helpful that's going to be in Florence with his present LE model car Rob .

meabh has very recent experience of these sensors on his Roadster in case that could help.

I put one of these cheapies in the front position a couple of weeks back. Didn’t know what to expect but its working well with a nice fast response time. Never replaced the rear before but believe they are similar devices. I just assumed that the blue/green colour coding of the connectors was to aid the gentleman at Kwick fit connect things up correctly as the two sensors perform completely different functions within the ecu.

Keith, Meabh here: I changed my pre cat sensor recently at 9000 miles due to a slow response signal and they do now have four wires. There is info on the net. As your friend says, they are expensive and cheaper ones can be bought - mine were £189 all told. As my engine is the Escape I had to be reminded that it is normally not in-line and bare that in mind when looking at videos.
BHM were very helpful as usual.

How did you know there was a slow response signal? What were the issues with your 4/4?

Bud
I used a code reader because the MIL kept illuminating - it's a Roadster.

Hi,

Both mine were replaced during last service.
I have the old ones at home. I tried to add picture size 622kb but the forum does not allow me to?
They were replaced by some aftermarket units, the garage spliced the wires with the original plastic sockets.
I plan to register the part number of the original units when I get back from my business trip.
Wish I knew which was located where as they are a bit different.