R30 Skyline Tachometer

[R30 freak]

Hi Guys

I have a 1983 R30 2.8 skyline that i have rebuilt. I cannot however get the tacho to work. I know that the fault is not on the tachometer itself cause I have tested it on my 4 cylinder and it picks up, but put it on the car and nothing works. I have tested the car's wiring and all seems to be in order. I am getting a 14.4V on the live wire the earth is fine and the trigger seems ok( when tested 11.4-11.9V intermittantly) does anyone have any advice on what i can do to get this tacho working as this is all that is not working on this car.

many thanks.

[BensDR30]

Hi Guys

I have a 1983 R30 2.8 skyline that i have rebuilt. I cannot however get the tacho to work. I know that the fault is not on the tachometer itself cause I have tested it on my 4 cylinder and it picks up, but put it on the car and nothing works. I have tested the car's wiring and all seems to be in order. I am getting a 14.4V on the live wire the earth is fine and the trigger seems ok( when tested 11.4-11.9V intermittantly) does anyone have any advice on what i can do to get this tacho working as this is all that is not working on this car.

many thanks.

Do you have the 2Kohm resistor plugged in adjacent the coil?

[R30 freak]

Do you have the 2Kohm resistor plugged in adjacent the coil?

I have the original resitor that is in the wiring loom. not sure what the value is but ill check. according to the photos of the drawings you sent me there is not supposed to be a resistor there but i'll give it a try. i must say thanks as you have been a tremendous help. thanks again. just incase anybody is looking for a full wiring diagram i'll post the link you gave me. thanks again

R30 Skyline wiring section from fsm: http://users.on.net/~kdpbgs/el.zip

[R30 freak]

I have measured the resistor and it measures @ 2.19kohm this is the resistor in the trigger wire that runs to the computer right? as the tacho trigger is also taken from this line just as it passes through the firewall. is this the resistor you are talking about?