what tacho do i need to work with my wasted spark as my tacho will not work with the coil pack

stack would be nice but £££££££££ is there anything else i could use

 

www.etbinstruments.com look at the vdo page matt

 

nice one cheers Jay

more fcuking money

 

its a fuckin cossie what do you expect

 

Small turbo Escos thats what ive just got

 

Cheers

 

is this why my rev counter wont rev past 4 k since ive had the engine rebuilt and the new fangled distributar-less coil pack thingy??????????...............sorry bout the technical jargon

 

i make then looms, for the pug gti-6 boys

 

The MSD wasted spark system already sends the correct number of pulses, they are just too weak.

 

Can't a pull up resistor be used to sort the weak signal?

 

thats what i was thinking martin, as Stack suggest it in there manual, using a pull resistor. unsure on the ohm rating though.

 

But only for some Tachs...
90% of the drivers we sell work the tachs perfectly fine with the suggested modification. The biggest problem are the early tachs such as these 3door ones as we havent had a set to work out how to modify them to accept a lower signal.

I am informed that the diode circuit above will work fine on the 3door tach, but i have yet to try it myself, although i did try it on an escos and it wouldnt work. Worth a try for the cost of the components.

Alternative remedies.
Use an Autometer tach signal doubler.
Fit an aftermarket counter.
Send clocks to a place who modify Tachs to wasted spark config.

 

Sorry Stu, think ive misunderstood slightly here.

So if I disconnect the "rpm output" wire on the ecu, and just take a feed off both tachos with a couple of diodes then my rev counter will work anyway as they generate the relevent spikes required by the dodgy ford tacho?

 

PS

Weird thing is with mine, it worked initially, then stopped!

 

Apparently so mate... give it a try.

Your Ford tacho is watching the coil field, and the 2 amp wires are of course still connected to a coil each.
The voltage there is the same as it was on a std coil.

 

Makes perfect sense

I'll do that then, cool.

JJ will be pleased too, as that should fix his as well then.


I thought from the fact you had bothered to develop a seperate output that the coilpacks must spike less or something like that, but obviously it was just to make it as easy as possible for people to fit?

 

Well, we didnt, Simon did, and he assured me that the zener diode circuit wont work. And, when i tried it, it doesnt.

However, i have heard of it being used successfully, so please let me know how you get on pal.

 

So will i if if does you could try it on my RS500 i got a spare clock but the ECU is in romford

 

stu, i've tried it on 3dr clocks and it works, escort it doesnt for some reason, as we tried it on kev's a couple of years ago.

 

Excelent news pal.


How bizzare. And to be fair to Simon, he did develop it on an Escort.

 

might just have been kev's car then, and we all know that car has a mind of its own

 

From what Stu is saying, it was Simon's too mate, and potentially all escos's therefore

 

chip, i think from what stu has said, simon developed the secs product on an escort, so an escort rev counter.

or maybe i've read it wrong?

 

Ryan, what is "it", do you mean the diode system detailed here that we are discussing, or are you chatting about something else?

 

no the diode system above.

been around for a while, as said i tried it about 2 yrs ago, when simon 1st released the s8.

 

Its that diode system that did NOT work on simon's car either from what Stu is saying, and thats why he said "to be fair to simon he did try in on an escort"

 

yeah sorry chip, reading further up the thread your right

 

Could I fit a tacho from another car like a escort/mondeo that already uses a coilpack?

 

yes you could do but the dial wouldnt match.

 

where do i need to fit them at the coil pack?


ps i dont have a clue when it comes to this sort of thing

 

yes off pin 1 & 3 of the coilpack plug, or off Pin 1 on both the ignition amps, whichever is either, and neither are

 

What colour is the wire at the rev counter end ?

 

green

 

Cheers Ryan


Simon does that all make sense to you?

 

dont have a green at the tacho

 

No you muppet!!!!

there'll be a green at the multiplug!!

 

I take it that pin 2 is green then.

 

[quote="kjc300

No you muppet!!!!

there'll be a green at the multiplug!! [/quote]


Oi bit less of the muppet

I did say i know fuck all about this side of the car

I take its multiplug at the back of the clocks?

 

the green wire is on the back of the tacho plug

 

I hope