i just tried the yellow/blue wire off of the stock ignition harness as you said, claudio, and it did nothing.


maybe i am missing something?

 

does anyone other than me actually have an E8 on a damn FD?

 

I'm still in the same boat. I tried hooking up the yellow connector with the blue/yellow wire to the PWM 1. I tried 5,8,12 volts and nothing. There has to be something not grounded or wired correctly. I don't have anything hooked up to the blue and the white connectors hidden in the driverside wiring. Anybody now what the pins on the white connector correspond to? I sort of took it apart to clean it up. I thought that there would be a wiring diagram outlining the connector. can't find in the manual.


Aldo

 

the answer to that question is in that e6k FD HOWTO link posted on the first page.

the problem with that is they use the stock ignitor/coils so the tach signal isnt changed at all.

i still have no tach

 

Ignitors, coils etc have nothing to do with the FD tach.

The FD computer reads the crank position on the cas on the front of the pulley and uses it to generate an variable freq signal that it sends to the tach.

Has nothing to do with coils etc.

Using an MSD tach adapter is a hack to get the tach working (and a viable one that saves a haltech output for something better).

But in reality if you can't get it working with the haltech, then there is either a fault in the haltech (such as the default map issue) or something is wired wrong or broken.

I would try first watching the the aux outs data page to see what PWM 1 is doing with the car running, datalog the output for freq and duty cycle. Duty cycle should stay constant and freq should rise and fall with RPM.

If you have an extra tach you could then hook it up to the PWM to fully rule out the haltech. Even if its for a 4/6/8 cyl engine it doesn't matter.

 

thank you colin. after checking out the wiring diagram more i will go back to the wire at the yellow ECU plug.

i spent a little too much time thinking after this post on the previous page:

 

https://www.rx7club.com/haltech-forum-62/i-need-help-wiring-stock-tach-551831/

here's the solution for the tach issue...for me at least...
hope it helps.

 

ok gohan that's great. thanks for that. it seems we have the same setup (ls1 coils) so that's perfect.

i am slightly confused by this part though.

edit: nevermind, i guess he just meant that those two things need to be connected to the light green wire.

 

got it hooked up. everything works now. i just connected pwm1 to the yellow/blue wire (smaller of the two yellow stock ECU plugs) and its working fine

 

I tried that but it didn't work. What settings are using PWM 1. Do you have anything hooked up to the white and blue connectors under the driver side dash?

aldo

 

I figured out the problem. The instrument cluster keeps going on or off I don't know why. When the pressure, speedometer, start working then the tach works. something is not grounded. Do you guys know what needs to be grounded?

Aldo

 

There's a ground wire for the instrument cluster in the passenger side kick panel.

 

yeah i think it's the only solid black wire on either of the remaining plugs

 

Is that one of the connectors? Single wire?

Thanks

Aldo

 

I'm trying to get the tach working but it only works sometimes. I'm guessing is a grounding issue. I just don't know what to ground. I can't find and black solid wires like you guys said. Can you guys be more specific?

Thanks

Aldo