[Diy_efi] Idle Musing: GM DIS on Jeep 4.0l

[bhu678 at gmail.com]

It's surely possible, I used an EDIS from a 90's escort to dump the 
distributor on my '84 Nissan KingCab 4x4, and the difference was 
impressive  and immediately obvious.  I used a MegaSquirt II/3.0 ECU to 
send it advance timing, and that works very well also.  Eventually I 
will finish the MS II side of it with tuned port fuel injection, but 
that is going slowly as I am having to design my own fuel rail and 
intake, since the z24 engine never came with port injection.  The EDIS 
system is very reliable, well designed, and easy to find in junkyards.  
It does require a 36-1 wheel and sensor, but these are easy to find/buy 
also.  The spark from the ford coilpacks can only be described as 
intimidating.  I am not looking forward to ever being shocked by one.  
The Ford coils do have a non-standard, snap-lock connector on the plug 
wires, but just use some 1/4" rope to get some good length measurements 
between your coilpack mounting location and your plugs on the target 
engine, then go shopping down at the junkyard.  Get the Motorcraft wires 
ONLY, and they will almost always be fine.  A testament to how well 
built they are is the number of Fords in the JY that still have the 
original wires on them.  They can actually last longer than the car.  
The reason for doing it this way is that the likelihood of a pre-made 
wire set down at the parts store matching your TOTALLY nonstandard 
application is practically zero.

Some links to check

DIY Automotive - The BEST place to buy a Megasquirt in the US
http://www.diyautotune.com/

Ebay search for EDIS, 36-1 wheel, and Megasquirt
http://shop.ebay.com/?_from=R40&_trksid=p4712.m570.l1313&_nkw=%28EDIS%2C+%2236-1+wheel%22%2C+Megasquirt%29&_sacat=See-All-Categories 
<http://shop.ebay.com/?_from=R40&_trksid=p4712.m570.l1313&_nkw=%28EDIS%2C+%2236-1+wheel%22%2C+Megasquirt%29&_sacat=See-All-Categories>

Megasquirt web site, EDIS info page
http://www.megamanual.com/ms2/EDIS.htm


Good luck, and happy reading!

Scott B
Gainesville, FL
84 Nissan KingCab 4x4
74 Datsun 260z









On 12/29/2010 9:59 AM, Cowen wrote:
> I've got DIS on the 3.4l in my MGA.  Now, I spent some lovely, 
> relaxing time in the cold sunshine yesterday tinkering on my Jeep 
> Family Wagon, and as I was cleaning the cap and rotor, I started 
> thinking about how nice it would be to have DIS on the daily diver too!
>
> The Jeep has a "Cam Position Sensor" in the distributor, so that would 
> have to stay to satisfy the PCM.  It also has a "Crank Position 
> Sensor" on the bell housing, reading off the flexplate, and that would 
> likley have to be left there to satisfy the PCM as well.  So, I'm 
> thinking I'd have to add another Crank Position Sensor , either on the 
> bell housing somehow (depending on the number of notches on the 
> flexplate), or on the crank pulley.
>
> The Jeep also has no knock sensor, so that would have to be bolted 
> onto the block somewhere.
>
> Now, I understand that Ford EDIS may be easier to add on to a system 
> like this, but i have no experience with EDIS -never even seen one!  
> On the other hand, there's a spare GM DIS module with pigtails sitting 
> in the garage...  I know that at some point, Jeep went to some form of 
> DIS on the 4.0l, but that was several PCMs later than mine.  I imagine 
> getting that hooked up would be as much work as a GM or FOrd setup, 
> but I don't know for sure.
>
> I know there are threads about putting DIS on a number of vehicles, 
> but I don't remember ever seeing this particular upgrade.  I figured 
> that, with the board being so slow, I'd ask if anyone can comment on 
> the feasibility (and maybe the details) of upgrading a 1996 4.0l I6 
> Jeep engine to some kind of DIS?
>
> Happy New Year, folks!
>
>
>
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