Cylinder select error

[JeepsAndGuns]

Doing some more playing around with my test harness in prep for my jeep 4.0 to 7727 swap. When I tested the harness, I was just using a $8D V8 bin and memcal, with minimal mods (disable egr, and error codes, etc..) I then took a V6 7727 memcal and removed the stock prom and sodered in a 27sf512. I burnt the test bin to it and have been using it to test the other ecm's no problem. I also plan to use this memcal in the the swap, since its 6cyl.

Only thing was, all times I tested a ecm, when I would run the distributor, after a few seconds I would get a check engine light for EST failure. I thought maybe I had a bad module, so I swapped it out and still same error code. Then I thought it maybe was because I was using a 6cyl distributor on a 8cyl bin. So I changed the cylinder number to what it should be for a 6cyl. Tried that and now not only do I get the same EST failure code, I now also get a cylinder select error. If this is a V6 memcal, and the cylinder number is set to 6cyl in the bin, why would I get the cylinder select error? And why would I NOT get it when running a V8 bin on a V6 memcal, but DO get it when I switch bin to 6cyl?

And last, would the est failure be because I am not actually running a engine?


Oh yea, heres my poor mans test setup...lol
http://www.youtube.com/watch?v=2aj9O...ature=youtu.be

[EagleMark]

Not sure on the rest but the EST error could be the EST in distributor is not grounded to the test bench harness... the mounting screws that hold EST are the grounds to distributor which is grounded to engine. Couldn't really see if it was in the video.

[Six_Shooter]

When you entered a value in the cyl select scaler, did you enter "6" or the hexidecimal value for 6 cylinder? Many of the XDFs I have come accross are set up to use a hexidecimal value there.

[JeepsAndGuns]

When you entered a value in the cyl select scaler, did you enter "6" or the hexidecimal value for 6 cylinder? Many of the XDFs I have come accross are set up to use a hexidecimal value there.

The comments on all the 8D xdf's I have seen say "use 0 for 8 cylinders, use 128 for 4 cylinders, and use 192 for 6 cylinders" So I entered in 192.

Mark, I will double check my ground for the distributor.

[dave w]

I'm wondering if the V6 Memcal will work with $8D, even if the cylinder number is set for a 6 cylinder? I've had cylinder select errors using a 7727 / 7730 V6 Memcal with $8D / V8 distributor. I modified the V6 memcal for V8 service and the cylinder select error went away. I've never tried using a V6 Memcal with a V6 distributor and $8D. An option I think I'd try; use a V6 definition with a V6 Memcal and V6 distributor and verify that setup is without errors.

dave w

[JeepsAndGuns]

I dont think there are any V6 $8D bins out there. The memcal I am using is from a $A1 car. But those are DIS. Are there any 7730/7727 V6 engines that still use a distributor?