Tacho

robdddd · Post by **robdddd** » Wed Nov 15, 2006 3:32 pm

Recently put an EJ22 in my L series.....there is a wire from the computer that is fo a Tacho, will this be suitable to run any off the shelf tacho? I assume it is just sending some sort of pulse signal ?

stinky · Post by **stinky** » Wed Nov 15, 2006 4:06 pm

yeah it should be. the one off my EJ18 works fine with the indash tacho on my '81 sedan.

Subafury · Post by **Subafury** » Wed Nov 15, 2006 7:29 pm

either that or connect it to the negative side of the ignition coil.

SuBaRiNo · Post by **SuBaRiNo** » Wed Nov 15, 2006 9:34 pm

Subi that wont work with an EJ22.

And yes that wire on the ECU will run any tacho... factory or aftermarket... there was some debate before to what the signal outputs but i have run mine off the factory one in the dash and an aftermarket one.

It is a negative pulse just like the negative side of the coil puts out.

Dave

SuBaRiNo · Post by **SuBaRiNo** » Wed Nov 15, 2006 9:35 pm

I can help with the ECU pinout for the tacho wiring if u need it too.

Dave

tim_81coupe · Post by **tim_81coupe** » Wed Nov 15, 2006 10:53 pm

Black Blue on a 4 plug ECU.... can't remember which plug exactly but the wire is black/blue.

SuBaRiNo · Post by **SuBaRiNo** » Wed Nov 15, 2006 11:26 pm

ECU pinouts.

Dave

robdddd · Post by **robdddd** » Thu Nov 16, 2006 3:10 pm

Thanks guys..........now I can get a tacho