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Forums34
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Aug 24th, 2023
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Joined: Nov 2013
Posts: 1,944
Talk Morgan Enthusiast
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Talk Morgan Enthusiast
Joined: Nov 2013
Posts: 1,944 |
I had the engine light going on last November.
No loss of power or any other mis-behavior of the engine.
They did not find a reason why the light went on.
Finally I got a new ECU as the car was still under warranty.
Similar to the Austrian dealer thought it was oxygen sensors, the fix did not last till I got home. Ran it for 2 months with the light on with no apparent loss of performance. Back at the dealer it eventually turned out to be the ECU which was changed under warranty. Tim
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Joined: Dec 2013
Posts: 44
Just Getting Started
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Just Getting Started
Joined: Dec 2013
Posts: 44 |
..JSHIFFER2...you mention a crack in the muffler will cause an incorrect exhaust back pressure which then cannot be compensated by the electronics & the engine light may come on.A lot of M3W owners have removed the cats & baffles from their exhaust systems.As a result has anyone had the light come on,& any corresponding uneveness in the running of the engine??
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Joined: Feb 2012
Posts: 1,664
Talk Morgan Enthusiast
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Talk Morgan Enthusiast
Joined: Feb 2012
Posts: 1,664 |
Was faulty o2 sensor when my check engine light came on.
Charlie, Former Editor
Morgan Owners Group - Great Lakes
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Joined: Feb 2016
Posts: 7,922 Likes: 217
Talk Morgan Guru
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Talk Morgan Guru
Joined: Feb 2016
Posts: 7,922 Likes: 217 |
..JSHIFFER2...you mention a crack in the muffler will cause an incorrect exhaust back pressure which then cannot be compensated by the electronics & the engine light may come on.A lot of M3W owners have removed the cats & baffles from their exhaust systems.As a result has anyone had the light come on,& any corresponding uneveness in the running of the engine?? Didn't he mention that light came ont with just one cracked manifold? Adding that when the other cracked it went out, suggesting it doesn't like an imbalance.
Richard
2018 Roadster 3.7
1966 Land Rover S2a 88
2024 Royal Enfield Guerrilla 450
1945 Guzzi Airone
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Joined: Nov 2015
Posts: 133
L - Learner Plates On
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L - Learner Plates On
Joined: Nov 2015
Posts: 133 |
With 4400 miles now, mine came on a couple times about 2,000. Deleted the cats a month or two ago, and the light has not come on at all since.
Dolph
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Joined: Apr 2016
Posts: 241
L - Learner Plates On
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OP
L - Learner Plates On
Joined: Apr 2016
Posts: 241 |
Still on after running the tank down and refilling. No visible cracks in the exhaust that I could see this morning. Still no noticeable performance difference. Could be an oxygen sensor
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Joined: Nov 2013
Posts: 582
Talk Morgan Regular
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Talk Morgan Regular
Joined: Nov 2013
Posts: 582 |
Still have the cats but removed all the baffles. Never seen a light. 2012.
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Joined: Jan 2015
Posts: 50
Just Getting Started
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Just Getting Started
Joined: Jan 2015
Posts: 50 |
Best thing is to download the S&S Pro Tune Software, pick the right matching USB cable and connect it to the ECU, which is sitting under the cover of the fuse box. You need a little torx tool to remove the little metal cover protecting the USB connector.
Ignition must be switch on to be able to access the ECU status, but it is not necessary to have the engine running. Check for the reported DTC's (engine trouble codes) and note them down. You may delete the errors, but the software must be first switched into Expert/Advanced mode, otherwise you can just review but not delete the trouble codes.
Then switch off ignition and check, if they are popping in again after switching ignition on again (if everything is ok they should be switched off after a couple of seconds).
For advanced users with some good basic understanding Pro Tune is offering a live monitoring mode, which allows to check all relevant engine parameters while the engine is running. There are a lot of field which can be added to get a better idea about the whole situation.
Keep in mind that all values are just values which are "seen" by the ECU. They might be bogus in case of sensor or wiring problems. In doubt you will need to find someone who is able to measure the real values to proof where the problems is caused.
M3W willow green,Triumph T100,KTM LC4 Adv./Freer.250R, RD250/RS125DX, Alpine A110
Kurt
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Joined: Aug 2013
Posts: 1,562
Talk Morgan Enthusiast
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Talk Morgan Enthusiast
Joined: Aug 2013
Posts: 1,562 |
Excellant overview Spelunx
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Joined: Apr 2016
Posts: 241
L - Learner Plates On
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OP
L - Learner Plates On
Joined: Apr 2016
Posts: 241 |
Best thing is to download the S&S Pro Tune Software, pick the right matching USB cable and connect it to the ECU, which is sitting under the cover of the fuse box. You need a little torx tool to remove the little metal cover protecting the USB connector.
Ignition must be switch on to be able to access the ECU status, but it is not necessary to have the engine running. Check for the reported DTC's (engine trouble codes) and note them down. You may delete the errors, but the software must be first switched into Expert/Advanced mode, otherwise you can just review but not delete the trouble codes.
Then switch off ignition and check, if they are popping in again after switching ignition on again (if everything is ok they should be switched off after a couple of seconds).
For advanced users with some good basic understanding Pro Tune is offering a live monitoring mode, which allows to check all relevant engine parameters while the engine is running. There are a lot of field which can be added to get a better idea about the whole situation.
Keep in mind that all values are just values which are "seen" by the ECU. They might be bogus in case of sensor or wiring problems. In doubt you will need to find someone who is able to measure the real values to proof where the problems is caused. I'll see if I can check this out. Thanks! Looked up where Waldshut was...I bet that's some great driving down there.
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