Fordmods Logo

EF tacho prob 


Page 1 of 1 [ 2 posts ] 

 Post subject: EF tacho prob
Posted: Mon Jul 22, 2013 5:39 pm 
Smokin em up

Age: 30

Posts: 218

Joined: 22nd Apr 2007

Gallery: 21 images

Ride: EF, Magna, R33 skyline

Hi guys I'm running a Haltech e6x with a EL dissy in a EF with a AU just wanted to know if I would be able to use the stock EF tacho?? I know pin 7? i think it is pink/blue is the tacho wire but every time I hook up the haltech AUX out wire and use that as a 0 to 12V tacho wire in the haltech or I can use a PWM output#2 but either of these dont work... I even when from the - side of the coil but still nothing... any help of this would be good as its starting to drive me nuts..
 Post subject: Re: EF tacho prob
Posted: Wed Jul 24, 2013 11:11 am 
Getting Side Ways

Posts: 496

Joined: 14th Sep 2011

Ride: BF II Gas Ute

Location: Canberra
ACT, Australia


I don't have the answer, but I hope I can point you in the right direction. In the EF / L the ECU sends a signal to the Tacho of 1 revolution. This means the Tacho is the same for a 6 or 8. If you look in the dizzy, there is a slotted disk. ( in effect, it is more like a cap ) It has a slot for each spark pulse, and there is one longer slot. The ECU sees this to sync the sequential injection pulses, and to know 1 revolution has been made. This then sends a signal to the instrument cluster, which has a lot of smarts in it. Now when you connected the coil pulse to it, you may have damaged it. The signal from the coil has " Back EMF " which means you may have sent a high voltage into a low voltage digital device. Test your cluster first, then if it works see what you can find with Google, you will need a circuit to clamp the voltage from the coil, and divide by 6. I would think that there are commercially made things to do this, and it would only take a handful of parts to make.

Plan B is if the Cluster has been damaged, fit the " guts " of a cheap aftermarket Tacho into it. Not as hard as it sounds, I have done a few. The hardest part normally is making the face, but that is already there. Now when you get one, look for one that has a center spindle. Some have a big hole in the middle of the face which they hide with the Redline marker needle.



Regards 96ELGli

Display posts from previous:
Sort by  
 Page 1 of 1  [ 2 posts ] 

Who is online

Users browsing this forum: No registered users and 23 guests

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum



It is currently Mon May 21, 2018 9:00 am All times are UTC + 11 hours



(c)2014 Total Web Solutions Australia - Australian Web Hosting and Domain Names