Good to here you got it fixed, i could use the guts from one of your spare tach's, ned to be working.

Let me know.

Chris

Whats wrong with yours?

Fault readings Adria, show about half the value, being it's a 3 wire, i can use the guts from a 260Z, i have tried to turn the screws on the back with no result.

Chris

Good chance the kickback signal is too weak and the tach is actually working. Check out the line resistor as described in zKars posting and measure the resistance of the tach to coil wire (disconnect the tacho and measure from the dashboard connector to the coil negative terminal).

Yeahr, Adrian, you are right, i will pull a test wire from the tach and direct to the coil and see what will happen, with and without a 2.2k resistor.

Let you know of the result.

Chris

Try to measure the overal resistance, should be not less than ~2-2.5KΩ. Not sure if directly connecting the tacho to the coil is healthy, get hold of a 1,5K and 1K resistor and try those instead of the existing inline 2.2KΩ resistor.