Subaru Tach ouput

Eatoniashoprat · Post by **Eatoniashoprat** » Thu Jan 24, 2008 7:10 am

Hi, This is for those with subies,

What is everyone here doing to hook their tach up to their subaru? I know some subarus ecu's put out too weak of a signal that most tachs won't pick it up, so you can either use a distributorless ignition tach adaptor which just boosts the signal (autometer $80), or I was thinking you could splice into two of the ignitor wires going to the coils, wire diodes into the two new wires, and connect them since this will give you a powerful signal and will be the same as a distributor would put out. If you had an EJ22 or something and didn't have coil on plugs than you could probably do something similar. So, How did you do it?

Mike

flat_iv · Post by **flat_iv** » Sun Jan 27, 2008 8:42 am

I have an Autometer tach that works perfectly with the subaru tach. signal

Eatoniashoprat · Post by **Eatoniashoprat** » Mon Jan 28, 2008 9:09 am

Thanks, that is what I wanted to hear.

yllwveedub · Post by **yllwveedub** » Mon Feb 04, 2008 9:44 am

If it makes you feel better, I'm also using the ECU out put with an autometer gauge, works perfectly...

panel · Post by **panel** » Sun Oct 04, 2015 12:00 am

Anyone know what the output is called technically in the wiring diagrams?

josh702 · Post by **josh702** » Sun Oct 04, 2015 2:24 am

VDO tachs also work, I was very surprised how well it worked.

Iguana · Post by **Iguana** » Mon Oct 05, 2015 11:10 pm

I have never found a Tacho that didn't work fine on the Subaru ECU factory Output.

If you tell me what ECU you have and what car it came out of I can probably tell you what Pin out you want for the Tacho.

Usually Called Engine Tachometer Output

panel · Post by **panel** » Tue Oct 06, 2015 6:39 am

^^^

Iguana · Post by **Iguana** » Fri Nov 27, 2015 1:48 am

Sorry for the delay I missed your post. Can you put up a picture of the front of the ECU where the plugs go in

panel · Post by **panel** » Fri Nov 27, 2015 10:13 pm

Here ya go......

Iguana · Post by **Iguana** » Sun Jan 10, 2016 2:47 pm

Are you running that ECU on a 22? It looks more like a 2.0L Turbo ECU ?

panel · Post by **panel** » Tue Jan 12, 2016 6:38 am

Yes 2.0L turbo

Iguana · Post by **Iguana** » Sun Jan 17, 2016 9:59 pm

panel wrote:Yes 2.0L turbo

Funnily enough I am pretty sure I have that exact ecu and loom off a JDM EJ20 Turbo on schedule for second week in March. I will check and get back to you but if you not in a rush I can post you the exact wire colours and pins of that mode ECU rather than generic. There are a few 257's in front but they have different ECU as do the EJ25. If you are in the rush I can see if the other customers are in the rush and pull the EJ20 Turbo fwd to do it early Feb. Just let me know, doing 2 looms a week at the moment so no shortage of Subaru Schematics being printed lol

panel · Post by **panel** » Wed Jan 20, 2016 6:49 am

I'll wait no prob

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Subaru Tach ouput

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