Jump to content
SAU Community

Recommended Posts

hey people having a few problems with wiring again (its almost done)

however.. for some reason we cant get any tacho signal wat so ever.. the pin coming out of the computer appears to be dead

computer is a mines remapped r32 gtr factory computer

anyone got any ideas on wat to do? is there another place to get tacho signal from..

neither the factory s13 dash tacho or the autometer monster will pick up any signal wat so ever..

anyone got any ideas??

Link to comment
https://www.sau.com.au/forums/topic/137366-tacho-signal-help/
Share on other sites

unsure if the s13 dash has a built in pullup resistor, if it doesn't you will have to add a pullup resistor to the circuit.

the same thing happens when you put the twin cam engines into r31 skylines and vl commodores etc

the pullup resistor needs to be 10k ohm in value and needs to go across the tacho out terminal on the ecu and a +12v wire on the ecu as well.

on the RB26 ecu they are pins 7 (tacho) pin 49 (+12 from efi relay)

once you do this the monster tacho will work, however the 4cylinder tacho in the dash will probably read wrong as its measuring pulses it expects to see for a 4cylinder engine.

hope that helps...

EDIT: ohh yeah the resistor you will pick up from jaycar or dicksmiths for about 10c!

Edited by RB30-POWER

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • The odometer does go up when driving.  Does this tell it is an issue with the speedometer itself?    Where can I look for replacement cluster? Or speedo? I can likely do the repair.. Will ER34 cluster work on HR34? Or do I need a HR34 20GT S2 specifically lol   
    • Mine's a bit bigger at 70x150mm roughly. The spots are flat, just can feel the edges if I dig my nail into it. I did fix some other other ones by both using my finger to sand that small spot (I'm a bit wary of doing this and creating hot spots and a bigger mess) and I also did sand over it flat and others, but this also worried me a bit because if I create an overall low spot on the panel on paint that is good.  Correct me if I'm wrong but as long as it's flat even if I can feel the edges, I can put filler because it will all be level once I sand it? I can see myself going in a circle after sanding guidecoat with 320 grit if for example the panel is flat with my hand but because I sanded the guidecoat I could have created a low spot again somewhere. Unless where I'm going wrong is what I mentioned previously where I didn't go low enough on the grits. It's 1 step forward and 2 step backwards here haha. I'll probably need to experiment with it more. Last time I go back to bare metal lol.
    • Thanks for the details mate , for me I think being a daily driven and happy with a basic tune (630Nm and 310kw) . Seems to be working well I just put on a set of Michelin Pilot Sport 4 should help put the power down. I'm going to start looking a brakes and LSD in the future so I might reach out to you on options to upgrade the brakes. Cheers - Dee   
    • I have a HR34 GT... RB20DE My speedo doesn't work! The rest of the gauges seem to work, fuel and RPM. I did not notice if my odometer was going up when driving last.  Any ideas? Speed sensor? Hopefully atleast... Gauge cluster perhaps? Or is that unlikely because the other gauges are working?   Any insight is appreciated. This is a rather new to me car. Lol 
×
×
  • Create New...