MathiasDKling
New member
Hello all!
Does any of you gurus care to tell me how the tachometer is wired, on a Cinq Sporting?
As parts of swapping the ECU, throttle body, ignition unit etc. From a Cinq Sporting, into my 91 Uno, i need to decide on how i want to run the tachometer from now on.
The Uno Tachometer runs off the no. 1 pin on the coil. Pretty standard for an electronic tachometer i suppose. That would mean it gets 2 signals per crank rotation, with the current distributor ignition.
The new ignition system, should i take the coil charging signal off a single coil, would by my thinking only give a single pulse per crank rotation. Therefore the tachometer would only read half engine speed.
I figure i might be able to make something up, with some one-way diodes, and joining signals from both coils, at the tachometer. But i wondered how the original tachometer in the Cinq Sporting had been wired. In case the tachometer runs on the same principle as the one i have in the Uno, then it must be getting a 2 pulse per crank signal, from somewhere else.
Infuriatingly i do own a Cinq haynes manual, but it doesn't include the tachometer, so that's no help.
I hope that someone here might be able to help me out, be that by a wiring diagram, or a simple explanation.
Best regards from Denmark
Mathias
Does any of you gurus care to tell me how the tachometer is wired, on a Cinq Sporting?
As parts of swapping the ECU, throttle body, ignition unit etc. From a Cinq Sporting, into my 91 Uno, i need to decide on how i want to run the tachometer from now on.
The Uno Tachometer runs off the no. 1 pin on the coil. Pretty standard for an electronic tachometer i suppose. That would mean it gets 2 signals per crank rotation, with the current distributor ignition.
The new ignition system, should i take the coil charging signal off a single coil, would by my thinking only give a single pulse per crank rotation. Therefore the tachometer would only read half engine speed.
I figure i might be able to make something up, with some one-way diodes, and joining signals from both coils, at the tachometer. But i wondered how the original tachometer in the Cinq Sporting had been wired. In case the tachometer runs on the same principle as the one i have in the Uno, then it must be getting a 2 pulse per crank signal, from somewhere else.
Infuriatingly i do own a Cinq haynes manual, but it doesn't include the tachometer, so that's no help.
I hope that someone here might be able to help me out, be that by a wiring diagram, or a simple explanation.
Best regards from Denmark
Mathias
