Rev counter woes

[roget]

I've had a cable driven rev counter converted to electronic (RVC) which is supposed to work with electronic ignition. Having wired it in according to the suppliers instructions the rev counter didn't work. I sent it back as faulty but the supplier has said it is working OK and will (if I pay for it) send me a memory stick showing it working. I have reconnected the unit and it still will not work. The supplier can offer no suggestions as to what might be wrong.

The connections made are power to one terminal, and another connection to the - ive side of the coil (car is negative earth). There is an earth to the case of the rev counter. With a meter I've proved the connections are all OK.

I do not know what type of electronic ignition I have but it is all hidden in the distributor with no external control unit.

Can anyone suggest a possible solution please. (I am considering reverting to points to see if that works!)

Roger



1966 A40 Farina 1330cc - 105 BHP
1965 Midge 1147cc

[harryworth]

I may have a similar problem with a unit I've sold. It is being used with a distributor with built in electronic ignition. The revcounter sort of works when the engine cranks over (needle moves) but stops when engine runs. The manufacturer had advised a change of coil to increase dwell time. The coil should be changed to a higher resistance one (about 3 ohm)

[roget]

Thanks very much for that - its the only response I've had from 3 forums and sounds a very sensible solution.

Roger

1966 A40 Farina 1330cc - 105 BHP
1965 Midge 1147cc

[roget]

Problem solved - having pressed the supplier for help he has now admitted that he incorrectly set up the rev counter for positive earth and not negative as ordered. Rev counter to be returned and a significant credit given for all the hassle.

Roger

1966 A40 Farina 1330cc - 105 BHP
1965 Midge 1147cc