Wales
by Joske Vermeule, September 1
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Forums39
Topics49,861
Posts837,532
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Most Online1,063
Jun 14th, 2026
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Joined: Jan 2023
Posts: 1,015 Likes: 119
Has a lot to Say!
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Has a lot to Say!
Joined: Jan 2023
Posts: 1,015 Likes: 119 |
If the spay patterns all look the same then the basic injector function is looking good the only other check on that is a timed volume delivery.
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Joined: May 2025
Posts: 8
New to Talk Morgan
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OP
New to Talk Morgan
Joined: May 2025
Posts: 8 |
I’m not sure this engine has a carbon canister unless you can point me in the right direction for it. I have changed all the vac hose and can feel pressure at the ecu, so I don’t think it that. I could possibly blow an air line from where the ecu is (no on to the ecu) to check it’s clear…
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Joined: May 2025
Posts: 8
New to Talk Morgan
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OP
New to Talk Morgan
Joined: May 2025
Posts: 8 |
I think this is where I’m headed. Even if it’s not that we don’t plan to sell the car.
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Joined: May 2025
Posts: 8
New to Talk Morgan
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OP
New to Talk Morgan
Joined: May 2025
Posts: 8 |
I have been thinking it is surely more likely a device, but I have replaces lots of sensors now. Another on I need to check is if there is a switch on the throttle, but I think it’s just the position sensor and that checked out ok. :-(
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Joined: May 2025
Posts: 8
New to Talk Morgan
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OP
New to Talk Morgan
Joined: May 2025
Posts: 8 |
In case anyone is looking at this in the future we eventually resolved the issue with a new wiring loom! So not entirely sure where the issue was but it was an electrical fault.
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Joined: Feb 2012
Posts: 834 Likes: 28
Talk Morgan Regular
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Talk Morgan Regular
Joined: Feb 2012
Posts: 834 Likes: 28 |
thanks for letting us know Ben, very impressed by the comprehensive list of checks you did.
1993 T16 +4 Lancia Blue.
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Joined: Jan 2023
Posts: 1,015 Likes: 119
Has a lot to Say!
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Has a lot to Say!
Joined: Jan 2023
Posts: 1,015 Likes: 119 |
Fairly sure there has been a resent post on similar issue and it turned out to be the ECU. He sent it off for repair and assessment and it came back fixed for a very good price!
Hopefully someone will respond with that info.
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Joined: Dec 2011
Posts: 9
New to Talk Morgan
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New to Talk Morgan
Joined: Dec 2011
Posts: 9 |
Hi, I had same problems with my 1991 +4M16 engine ,at the end t was the idling air stepper motor sitting on top of the throttle, put it out placed in a standard and spray some WD40 on top for several days, put it in again and idling again at 750-800Rpm. Best regards, Bart Bonnaerens/Belgium
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Joined: Mar 2009
Posts: 2,290 Likes: 9
Talk Morgan Expert
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Talk Morgan Expert
Joined: Mar 2009
Posts: 2,290 Likes: 9 |
Hi Ben,
I am glad that you found the answer: my own guess was that it was electrical due to me experiencing a not entirely dissimilar problem years ago with an M16 Plus4 which turned out to be the alternator which and the end of the long list I decided to replace. The engine was sometimes hard to start but would then run well until 4000 rpm when it would cut out and idle for a few minutes. If anyone else comes across this problem, the altenator would be one of the places to look.
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Joined: Oct 2018
Posts: 60 Likes: 2
Just Getting Started
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Just Getting Started
Joined: Oct 2018
Posts: 60 Likes: 2 |
just another point. If the car is running/moving, and as you slow down, idle drops off and the car dies, it's the speed transducer on the speedo cable! Do not buy a new one for $100.... the part is a $.10 resistor you can replace at home. In the mystery box is a resistor, magnet and a reed switch. On mine, water shorted the resistor. Simple fix discovered after I spent money on a new one. Again, it will not idle if the car is coming to a stop. The box sends an idle mixture message to the ECU. Mine's a 91 plus 4/M16.
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