127730 with DIS

[D Max]

Did some troubleshooting today......

This is what i all did:

checked all the connections, and they are like they should be on the wiring diagram above...
Measured the bypass wire between the the DIS and the ECM => it is not interrupted
Checked the advance with the strobo => it is 4° at idle, and goes to 12° at about 3000rpm.
It does not make a change if the bypass wire is disconnected.
(that 4° is a indication, since there was no reference point on the 3.4, and I fabricated one myself)
Swapped a ICM with an ICM I have in stock => no difference
Swapped a ECM => no difference

So the problem still exist: No tach and throws code 42

[D Max]

for the moment, i came to the following conclusions:

the ECM gets a reference signal from the ICM (=> fuel injection works + tach signal in Tunerpro)
The 4 wires between the ICM and the ECM have a near zero resistance.
The ECM does not put 5v on the bypass, but sets code 42 instead.
Try to find an oscilloscope, to check the signal on the white wire (est)


someone with any ideas?

grtz, D

[1project2many]

Faulty module or ecm, or wire for bypass may be in wrong spot at ecm connector?

[D Max]

bought myself a third ICM today.
Connected it => same problem
Seems not logic that 3 ICM's have the same problem, and nobody seems to have had the same issue.....

tested the tach with a pulse generator => it works

@ 1 project2many: nothing changed to the ECM, I guess I do not need to change wires to it when swapping to DIS? Or do I....

grtz, D

[D Max]

Now it is getting weird.....

today I put in the original AZTY bin that works with the distributor....

It runs (ok, it surges a lot...)
but no code 42, no SES light, nothing....

with a little bit throttle, it stalls, but stil no SES light....

WTH????

[icsamerica]

You may want to reivew this thread
http://www.v6z24.com/jbodyforum/supe...d-t111745.html

I edited the 7730 v6 DIS bin for use with northstar V8 dis on an SBC. It's been running perfectly for a year

[D Max]

discovered today that the BFAU bin works also... at least I have a base to work with..
Advance works with this bin, and no SES light. Engine runs OK
Only the tach does not work at the moment, but on the other side, i didn't remove the filter also (can't find it)

@ icsamerica: seems like it's gonna be a long evening for reading it... seems interesting!
maybe it's nice to change it back to the normal v6 dis.
Are there a lot of options added, beside the change to the northstar V8?

[icsamerica]

discovered today that the BFAU bin works also... at least I have a base to work with..
Advance works with this bin, and no SES light. Engine runs OK
Only the tach does not work at the moment, but on the other side, i didn't remove the filter also (can't find it)

@ icsamerica: seems like it's gonna be a long evening for reading it... seems interesting!
maybe it's nice to change it back to the normal v6 dis.
Are there a lot of options added, beside the change to the northstar V8?

I did find it interesting too and I love the results. My engine never felt strong above 5000 until I switched to DIS.

Read POST 33 in this thread. I made the DIS tach adapter with about 2$ worth of components I bought on ebay. Been working perfectly.
https://www.thirdgen.org/forums/v6/5...rong-your.html