ive wired mine up to the edis module using my original mfi loom to the speedo from the original coil, think its still reading wrong, do i need to wired up both green wires from the original coil??

 

If your tachometer was previously driven by a single coil, your tachometer will need input from two coils to indicate properly. Below is a simple circuit showing how to interface the EDIS system with your tach:



Go to Maplins for the bits.

 

wont the fezzy coil pack be the equivalent to 2 mfi coil packs then?

sorry to seem stupid but whats the d1 d2 bits ect?

 

Sorry to hi jack the post but got similar problem with my car got coil packs using a p8. In the diagram are the traingle bits diodes? If so where do you get them from?

 

Get the stuff from Maplins,as wrote above already!!!Regards,Micky

 

didnt see that!

 

Yup, three diodes (D1,D2 & D3), D3 is a zener diode.

So you want 2X 1N4004 and 1X 1N4746 (should set you back about 50p )

Best thing to do is print off that diagram and take it to Maplins

 

If you connect the original green tacho wire to edis pin 11 then it will read fine. you will need to put an extra pin in the edis plug though as it doesn't have one for pin 11.

 

1.9s1 is this method using the MFI clocks or did you have to change them to get the revs to work at pin 11?

 

rrr yes just checked mine, where can i get the bits to put another pin in? need a kit of some kind

if the rev counter isnt wired up properly as mine is now, would this cause proplems for the idle and the set up of the idle ?

heres my problem

https://passionford.com/forum/viewtopic.php?t=258766

 

Pin 11 of the EDIS should be the easiest solution.

 

anyone done this method? added a extra pin?

 

what you havin trouble with mate?

 

Probably same problem i have, he must of added another pin and it still dont work.

 

Doesn't work in what way?

 

rev counter doesnt read at all.

 

duno how to go bout adding a extra pin in the edis block connecter so that pin 11 is added

 

I think you just drill a small hole as the back piece of plastic is blonked over, and then you can insert a pin. You'd need to go down the scrappy and get a pin out of another EDIS plug though

 

rrr i see

 

 

just thought, where does a fezzy turbo get its rpm signal from then if theres no pin in number 11

 

The rev counter is calibrated to accept the signal from one of the DIS coils.

 

if the rpm isnt wired up would this afect the idle behavier?

 

nope

 

r ok, cos i know when you set the idle you have to hold it a certain revs, with the idle valce disconnected, but wonderd if it read that through the ecu or the speedo

 

Nah it only measures the low tension signals

 

http://www.feoc-uk.com/forums/index.php?showtopic=60953

 

Do the negative side of coil 1 and 2 mean the original green wires going to the ignition coil on the s2?

 

I have set this up, however my needle is sometimes accurate and sometimes just lays in the corner. Is my revcounter broke? Signal looked good on scope!

 

Swap the 1n4746 for a 1n4744, it has a slightly lower voltage rating. I don't seem to have any issues with mine.

Lee