Lotus Elan M100 Electrical Problem

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Lotus Elan M100 Electrical Problem

Postby ianr » Wed 27.09.2017, 22:06

Hi Can anyone help me with a frustrating problem. My Elan drives well for several days/weeks, months even years etc, then suddenly a recurring fault happens. The engine will cut out at various speeds from 10 miles an hour to 70 miles an hour. A few years ago it was diagnosed at a lotus specialist, as being one of either of the two large multipin connectors on the right hand side of the engine, as you look at it from the front just below the header tank. The multipin connectors were taken apart and cleaned and the car has ran perfectly for the last 4 years. Suddenly the fault has reoccurred, the engine cuts out whilst driving, I then wiggle the two multipin connectors and the engine will start and will run for anything from 5 mins to an hour before it cuts out again. Anybody out there can help. I had a car electrician look at it today and they cannot find the problem, but are talking about trying to replace the multipin connectors, but are not sure if they can source these or if it is possible, please help.
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Re: Lotus Elan M100 Electrical Problem

Postby rip » Thu 28.09.2017, 03:31

Hi. Welcome to LEC.

I saw a similar issue on an Elan a while back. It has an isolating switch which was found to have dirty contacts.
Being fibreglass-bodied, the Elan suffers from bad earthing so it is possible that this is the cause of your problem. The engine bay earthing point is hidden behind the brake servo.
Cleaning & protecting this will be a good action to take. There is a good chance that this is the cause of your problem but, even if it isn't, it is a good thing to do.
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