Coil pack rpm signal help needed

[Ash-b-84]

I have a renault clio 182 2.0 2004 it had coil pack
I have used one of the smaller 3 wires from the coil pack as a signal but it reads 14.0-14.6v when the car is running which I believe is to much for the race capture
When connected I freq input 1 the readings are irattic and jumps from
40-22000 without any movement of the throttle

I can't seem to get an rpm signal from
Anywhere else , can I put t a resistor in the line from the coil pack
To the race capture to drop voltage down to 5v ?

[brentp]

Hi,

We have a CoilX module which is designed to adapt the the high voltage RPM signal to something usable:

http://autosportlabs.net/CoilX

Hope this helps!