Talk Morgan Forums Morgan Sports Cars Maintenance & Servicing Oxygen sensor part number?

thank s again john,i am indeed a member,for a couple of years.i think i am in the new forest section.last ferry back to the island at my end is 8pm so a bit restricted getting back

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I have learned to have limited confidence with GEMS and a stock code reader. Which code(s) were you given? A mildly rusted wire at the exposed
sensor will give you the same code as a single totally failed oxygen sensor.

LAW OF COLLECTOR CARS:To enjoy any Morgan, you must become self-sufficient with it. Its best mechanic...albeit only specific to one car/model.



Yeah. I began as a jurist..though I retired very young.

As for the diagnostic tool for GEMS..these change over time, always getting cheaper. The first one, manufacturer issue, was cunningly priced to keep owners
out of the repair market. They are no longer priced at 30,000. I have a good 14cux/GEMS friend in the UK. Mark Adams of Tornado systems. Give him a call.
Sweet guy. I can walk one through most easy Morgan GEMS fixes, but your goal should be the adhere to the law above. I prefer setting up a methodology for your next issue.



Insufficient.

Start by asking Mark Adams for what diagnostic/programming unit he can still recommend. Many are sill around and work well. But whatever you choose
to do will be a learning experience in one way or another. You will learn what support network will benefit your car the most. Actually, the best GEMS person
our Morgan community ever produced is on this forum, merely not active. But your issue is straight forward.

Please try all suggestions given in this entire thread and report your experiences. Good luck.

gmg

Gomog has a link in the Plus8 section that goes to the Gems manual from David Poole. It is a decent reference document and is where I found the part identification for the oxygen sensor. It's the same sensor for all four ( pre-cat and post-cat.)
My obd tool is an Autel Maxiscan and is a good one. However it is an older version that is no longer supported for upgrades to software. When connected it allows selection of vehicle make so both Rover and Landrover are available to use. The ability to display outputs whilst the engine is running helps a lot, it showed the voltage variation for my faulty sensor confirming it needing replacement. Because it was the sensor after the cat the engine was running ok as those sensors basically check the cat only so the Gems gets good feedback from the pre-cat sensor to manage the engine. The part ID on the sensor itself didn't help as I couldn't trace it. Luckily the Gems manual had usable part numbers.
Rimmer Brothers are a good source for spares.

thank you to everyone for their help and advice,i have downloaded the gems manual and am going through it,what a piece of kit!.i am certainly going to invest in a good scanner.the codes were read at a kindly maindealer who i was near to at the time they were very busy,they helped me out as i wasnt booked in my yellow warning light had gone off again when they looked at it,they reset but advised to replace both lambda sensors,car was fine for 150 miles back but started to play up coming off the ferry,fast idle then erratic turnover,exhaust seemed more dirty than before.as i say i am finding my feet.i will speak to mark adams today,iknow with the information given to me and what i have read the immobiliser can and in my case certainly will give me some grief so i will get that sorted before it gets a chance.i would in a perfect world go to and stay with one place,who knew their stuff.i have a more than decent mobile mechanic here and he is more than happy for me to "help" him and learn.electrical problems on the isle of wight are a real pain the service here is pretty grim and usually involves a second opinion on the mainland,getting over the water being the biggest problem.i have just received an e mail from a large parts firm re the sensors that they say fits my car,so will double check that and contact mark adams , i will report back,,,,after waiting so many years t go back to owning a morgan and to start off like this is a bit of a downer ...but it could have been worse i could have brought a tvr thank you

If the codes you had were for a faulty lambda sensor then you have to find which of the 4 it is.
You say the engine didn't run well and the exhaust was not good. That suggests a pre-cat sensor as they are the ones that tell Gems how to alter the management. The post-cat sensors ( as I described earlier) just check the exhaust AFTER the cat has cleaned the exhaust gas. Basically checking that the cats are ok.
The lambda sensors are often hard to remove as they seize in place and getting a socket / spanner to fit is a problem. The multi pin connector and wires stop a socket or ring spanner fitting. Open ended spanners can slip off due to a small space to fit to the hex on the sensor. If you are CERTAIN which sensor is faulty you could cut the wires close. Suggested options include cutting a slot in a socket to let the wires stick out or a cut in a ring spanner to do similar. Spraying release fluid is a must! Last resort is a blowtorch! Even removing the cat to work on a bench would help BUT you then have to deal with clamps and resealing after refitting.
Good luck!

thank you again,both sensors out.fae 777350 markings confimed,brands hatch told me the faulty sensor was driver side but to replace both...a bit of progress,still unsure about replacement its a minefield,i have a list of alternative sensors from oxygensensor website but when i enquire with the part no the various companies come back with it doesnt fit although some look identical,have left an e mail with mark adams at tornado and awaiting reply.might have a decent lead on the fae sensors but its a long shot...and a long wait.i am pretty cheesed off with it,but not as cheesed off as yesterday so a bit of progress....i still love the car.again thank you for your advice

just to add i bought a socket set off e bay specially for these sensors with a groove in the sides for the wires otherwise i would have even less skin on my hands than i have now.getting them out wasnt as bad as i thought, used the releasing fluid,i suspect they have been out before i hope the cat is ok

finally got the sensors via a main dealer,it seems the old fae ones were for both the 4.6 and my 4.0,no matter i couldnt get them anyway,now have lucas leb 396 sensors.first lesson learned, main dealer first,parts companies second.on the web there are sites that give you alternatives but the lucas ones were not on it.a lot of the parts companies dont have morgan on their list and in my case because the previous owner put a private plate on it ,it is not recognised by its number plate.sadly the problem is still there,fast idle then slows< up and down and then in my case at a hill side t junction gave up the ghost,got it going buts it is running like a dog.nothing showing on my cheapo code reader,so have managed to get it booked in to a garage who have an autologic machine,they didnt reply to my e mails so went there in person ,on a bus.i have took go mogs advice contacted mark adams and will put a dent in my depleted morgan fund.tornado chip,knock sensor and immobiliser issue(which i havent got yet)and anything else he can think of will go on the list,including a scanner that reads morgans,just awaiting a reply,my own gut feeling its an injector problem,but with my lack of knowledge a bad back and an increasingly short temper,the car is on the naughty step in the garage and i am staying clear until monday week when i will try to get to the autologic garage"if we are not to busy"which doesnt bode well......i hope we have an indian summer

the saga goes on had a call from autologic garage who have an unexpected cancellation ,car wont turn over...just a click.walked away from it...still awaiting replies re scanner and everything else,mighty cheesed off with all of it

Jeez, so sorry to read that, perhaps a battery isolation switch might be worth a try, when you do get the wiring issue sorted, which you will to then go on to really enjoy your "new" Morgan.

BTW my old Mog with it`s wet (not gel) battery is always connected to it`s CTEK MXS 3.6 float charger which I leave switched on. That has worked well for me even after very long (too long) periods of storage.

Hope you get it sorted out soon.