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#770180 28/02/23 03:12 PM
Joined: May 2010
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sospan Offline OP
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MIL has come on. OBD reader shows oxygen sensor problem. I’ll check the wiring but looks like a new sensor (s) needed.
Engine is a 4litre with Gems management. Sensors before and after the cats. Anyone know the sensor part number in case I need to replace. Engine is running ok and it looks like the post cat sensor is the cause. Fluctuating voltage seen on live running check. Hoping it is the sensor not the cat itself ( or both £££ spend).
Fault code is P1193. Possibly sensor heater issue.
Cold start and no light. Light on a few miles down the road when things have warmed up.


Plus Four MY23 Furka Rouge
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sospan Offline OP
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Found the sensor and replaced. Checked the Gems manual in Gomog and found an ID for the sensor. Phoned Rimmer Bros to confirm as they had some showing. Bought, arrived and fitted. Same sensor for both pre and post cat. Cancelled the fault codes and ran the engine. All ok. Did a short test drive and ok. Did a longer run yesterday and all ok.
As part of diagnosis I used my Maxiscan to do a live data run. It showed a varying voltage on the pre-cat sensor on bank 2. The even cylinder numbers so engine rhs (not post cat as in the previous post). Checked plugs and all looked ok. Sprayed release fluid on the sensor whilst waiting for the new part. Unscrewing it went ok, removing it via the chassis access hole a tight fit. The grommet protecting the wires needed taking off and the multi-pin connector also tight to push through. There are 2 sensors routed through so a bit of teasing needed. CAREFUL smear of copper grease on the new sensor thread. Tightened to torque ( best guess as open ended spanner. No way to use a socket/ ring spanner unless they have a slot to pass the wiring through). They are available but not needed in my case.
The Gems manual sensor number is AMR6244, Rimmer Bros found it easily to confirm.

Last edited by sospan; 20/03/23 11:09 AM.

Plus Four MY23 Furka Rouge
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hello this is my first post on here.after a 40 year gap have jumped in with both feet and bought another morgan,a 2003+8 with gems.i am certainly in at the deep end,having a problem with the lambda sensors.i am on the isle of wight no one here is interested in working on the car despite 16 emails with just two negative replies,but i do have a more than helpful mobile guy.getting to a main dealer on a trailer is mega expensive.the two sensors are made by fae with a ref 77350,which i cannot seem to source does anyone know of an alternative.one company did reply with sensors that work on range/land rovers with the similar engine but its all a bit vague.its going to be a steep learning curve,its an oldish car has not been used much with low miles and has been looked after,i know i will have glitches i am expecting that but need to be prepared which i am not at the moment,can anyone help me please

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MMC have on their website part books for your car. I would call Brands Hatch Morgan they will know.


JohnV6
2022 CX Plus Four
2025 MG ZS EV aka Trigger
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thank you john,i am a regular customer at brands hatch morgan. ...i bought a hat there in 2019,will give them a ring and look at the mmc website.thanks again,one things for sure it will start raining as soon as i get up and running again

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Rain is fun get it fixed & use it


JohnV6
2022 CX Plus Four
2025 MG ZS EV aka Trigger
Joined: Jul 2024
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certainly wasnt for me john on our maiden voyage back to the isle of wight got caught in a deluge,10 minutes trying to remember how to put up the easy up hood,rain stopped,decided to crack on hood down and dry off back to the ferry.arrived at lymington my wifes hair looked like a cross between a 80s punk rocker and a rhode island red,and me an arthur scargill ,bobby charlton comb over with a touch of jimmy hendrix at the sides and at a jaunty angle similar to looking down on an aircraft carrier,it certainly wasnt a good look

Joined: Nov 2006
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Talk Morgan Regular
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Originally Posted by wightmog
hello this is my first post on here.after a 40 year gap have jumped in with both feet and bought another morgan,a 2003+8 with gems. I am certainly in at the deep end,having a problem with the lambda sensors.

Cb]Congratulations or your Morgan purchase![/b] Morgan trads seem not as easy to maintain as they were 40 years ago, but that is not true, merely the current consumer mind
training. You merely need new tools. All of my Morgans were/are Efi and I never required another mechanic unless I lived far away from the subject car, I have no formal training in
mechanics or electronics and no special abilities in this area I can think of. I merely find it all fun.

Forgive me, but what makes you think it is the lambdas? Do you have a diagnostic unit? That would be great. It is odd that two sensors would fail simultaneously. BTW, the
MMC does not carry parts for the engines they install. Relying on them does not help them. They have moved on.

Originally Posted by wightmog
I am on the Isle of Wight. No one here is interested in working on the car despite 16 emails with just two negative replies,.

😂 You are now in the same spot as an oversea mogger. Most of us too far from any Morgan dealer. In your case, be happy as most GEMS Plus 8s were sent overseas. A
substantial support network was created as Morgan engine providers contracts do not include engine manufacturer support for owners. They will not have much to do with moggers,
though many love looking at our engine bays. (wryly) Your car is also more than 21 years old..probably older than most dealer mechanics now.

Originally Posted by wightmog
it's going to be a steep learning curve

It does not have to be. A lot of fellow Morgan owner work has gone before and that will help you. Of course, the GEMS variant has more things that can go wrong and parts are
harder to find but you have Morgan resources. Less used cars have more issues than regularly used one. With a little patience, you can cure all ills and save this Morgan from
the sad fate so many are condemned to these days. You have resources available to you. In your case, https://www.gomog.com/allmorgan/gemsPLUS8.html is a start. Try the
GEMS Manual(at the top) first. From its traffic since posted, it has been one of the premier aids for the entire world GEMS community (non-Morgan as well) for those two decades.
(Now there are also other helpful writings.) Think of your fellow moggers, this Manual and previous mogger experience as tools.

Another major tool is a GEMS electronics diagnostic unit. Do you have one? Yes, its expense is a PIA, but without one it is akin to working without a multimetre (buy one also) in
auto electrics.In fact, with the first Morgan EFI system, diagnosis only requires a multimetre! Do you have all these tools?

I dislike advising telling people to replace components without a diagnostic verification AND a check of the wiring. Too often people present an unsupported and wrong punchline
without describing the specifics of their problem.

BTW, Lambda sensors are generic..like spark plugs or tyres. You merely want them to match your wiring connection or you will have to modify that. (not hard either)
Google 77350 oxygen sensor UK and pick those with same connectors. Figure 50 quid each.

gmg

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what a reply ,thank you.had the car fault tested on the mainland when it was running and it came up with the sensor issue codes.i am certainly no mechanic and am finding my feet.have looked for a gems diagnostic tool,but so far no luck.i do have a basic cheap code reader that does read the codes.i use a local mobile mechanic who works on anything from 40 tonne trucks downwards.there is a garage not that far who has an autologic machine but he doesnt bother to reply.i want to use the car all year,much of its life it has been stored it has only done 19000 miles in 21 years ,so not so good.because of my lack of knowledge i fear doing something wrong to the car,thats why i check on here.thank you for your advice

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If you are not a member join MSCC and SogMog (who I think are the local centre) . They will help you I'm sure.
The link is
here

Even if you aren't an MSCC member I'm sure they will help on a one off basis


JohnV6
2022 CX Plus Four
2025 MG ZS EV aka Trigger
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