If the engine stops then the Tacho will go to zero as there are no revs!!!! Always remember to start simple and by elimination move up the complexity scale. Firstly go around making sure all the electrical connections and leads are in good condition and secure, as stated above swap the coil, check the rotor arm for any arcing, check the vacuum is working, I would also add check the spark plugs are in good order and the lead connections are tight. Engine heat can cause some strange happenings that are difficult to trace but simple to cure. If the car is standing with the engine at running temperature does it stall when you rev to 1500 or is it only when you are driving?
For clarification you state:
"When she stops, the tacho drops to 0 (which suggests the coil power is unpowered), but then in a fraction of a second the tacho comes back, and the engine restarts (similar to a clutch start)."
The Tacho will drop to 0 when the engine stops but then you say the Tacho comes back and the engine starts, the Tacho should only "come back" when the engine has started not the other way round is this correct?
Last edited by britmog; 18/04/24 03:03 PM.
