Subaru Leone RX 1987 4 plug ecu engine tach wire / rpm

Subway eat frsh · Post by **Subway eat frsh** » Fri Apr 12, 2013 12:12 am

I am new here on subie forums... I,ve got problem with installing "piggyback" computer to my subaru rx leone turbo 1987.. It has 4 plug ecu cable, and the problem i,ve got is that i dont know where i can get the tach/rpm signal for my piggyback. It need tach/rpm signal for working. So does the 4 plugs what goes to ecu have this tach/rpm signal wire? And if it does what wire is it ?

- Greetings Virta

steptoe · Post by **steptoe** » Fri Apr 12, 2013 10:21 am

Couldn't you just take it from the coil. I declare i forget which side of the coil is tacho - er neg ?

RSR 555 · Post by **RSR 555** » Fri Apr 12, 2013 11:40 am

Are you using a wiring diagram to wire up the piggyback?

The factory ECU will get a RPM sense from the engine but you'll need to check against the wiring diagram.

Subway eat frsh · Post by **Subway eat frsh** » Fri Apr 12, 2013 5:38 pm

Hello!

Yes, i am using a wiring diagram, and i forgot to reply that i found the wire, wich leads to tach..

Greetings Virta