David Jenkins
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| posted on 2/1/07 at 07:40 PM |
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Puzzled by EDIS 4 connector
I have 2 EDIS-4 units ready for installation, each with their own connector (I'm only fitting one!). All the Megajolt instructions show a tacho
outlet on pin 11, but both of my connectors are lacking a connector in this position. The EDIS units have a pin there, but it's not being
used.
Should I be worried about this? After all, there are 2 other ways of attempting to get a tacho feed - the MJ connector and the coil outputs (via
diodes).
I'd rather not go looking for another connector as I've been to 2 scrappies today, and I only found one car with the right kind of
ignition system - it looks like the older cars are getting trashed ASAP instead of being left around the yards...
cheers,
David
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Surrey Dave
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| posted on 2/1/07 at 07:44 PM |
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I Think
I think some people have used the edis output , I guess it should work with a Ford gauge ,but most seem to end up using either diodes or
diodes+resistor from the coilpack.
So you probably will not need it , it did not work on my Skoda revcounter!!.
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David Jenkins
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| posted on 2/1/07 at 07:49 PM |
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That's what I suspected - it's just that I'm about to wire everything up, and I don't want to waste time and effort putting in
the wrong connector (especially as it's the biggest one...).
How have people arranged the 3 diodes? With a bit of circuit board, or just covered with heatshrink tube?
David
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Surrey Dave
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| posted on 2/1/07 at 07:52 PM |
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Bullets!
I cant remember exactly but I know I used some bullet connectors and sleeves so that if the revcounter components went down and messed up my sparks I
could unplug them and still get home.
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roadrunner
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| posted on 2/1/07 at 08:47 PM |
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it's not a problem having that pin missing, it is missing on mine, i just connected the tacho to the white wire from the megajolt.
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David Jenkins
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| posted on 2/1/07 at 09:16 PM |
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What make of tacho are you two using? If either is an electronic one from CA, Smiths or Greengauges then I'll be well chuffed...
DJ
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Marlon
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| posted on 2/1/07 at 09:20 PM |
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i have drilled a 3mm hole through the top of my edis plug over where the wire should be, fed a wire through and attached a female pin into the plug.
Works a treat.
Band Anyone?
Linky to SWMBO 's band
Linky to Brother in laws band
MKoc 1081
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paulf
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| posted on 2/1/07 at 11:55 PM |
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It is possible to dismantle the plug and add an extra pin from a spare plug by drilling a hole in the backing piece. I have not seen many plugs with
the tacho pin fitted so it wont be worth looking in the scrapyard.
I used the diode circuit but had a problem with the zener diode breaking down and causing a hard to trace missfire. I am using an old ford tacho and
it wouldnt work from either the Megajolt or Edis output but I eventally got a usable signal from the pip signal on pin one of the edis , i just
piggybacked onto the connection to the megajolt and it has worked fine ever since.
Paul.
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garage19
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| posted on 3/1/07 at 07:57 AM |
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David,
Whenever I have used the EDIS unit on MJ or MS installs I have left the pin on the EDIS unit and used the diode set up on the low tension side of the
coil pack. Has always worked a treat. Diodes cost a grand total of 18p for all three from Maplins in town. I just solder and shrink wrap.
So you are dragging that crossflow into the twentieth century! 
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David Jenkins
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| posted on 3/1/07 at 08:37 AM |
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Half-way there, anyway! I've chickened out of MegaSquirt for now...
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