Lotus Elan

Dead tacho again

PostPost by: Uboat » Wed Oct 01, 2014 6:53 am

Hi,

I had my rev counter refurbished to fit electronic ignition some years ago, as it was bouncing, and it is now out of order again.
The symptom: the tacho fires up when ignition is on and the engine idles, and sinks slowly to zero after a few seconds and stays dead.

This happened 50 kilometers after the refurbishing the alternator, which became dead again. Can it have anything to do with this?
Any clues?
/Ulf
1974 Lotus Elan +2 130/5
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PostPost by: billwill » Thu Oct 02, 2014 9:55 am

Just a possibility, but if the alternator became disconnected from the battery while the engine was running it could perhaps have run wild and generated a very high voltage which destroyed some of the electronics in the tacho.
Bill Williams

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PostPost by: john.p.clegg » Thu Oct 02, 2014 11:18 am

I had similar symptoms on mine ( after refurbishing ) and I managed to trace it to either a dry joint or split in the circuit board ( it was years ago ) easily cured with a little solder and a hot iron,but for this you need to take it out of its shell and magnifying glass it...

John :wink:
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