OK I've got a 93 f150 302, automatic E4od, I want to go Mass Air and the Mustang Computers look like they're best suited for my eventual mods, problem is the Mustang computers don't support E4od transmissions, now I figure I can rig the Mustang computer and F150 Computer together to run the transmission.
Could I daisy chain the MAF computer and the SD computer together to control their respective components.​​​​
So the SD computer needs say three sensors to run the transmission and the MAF needs the same sensors to run the engine would I just make a pigtail harness and connect both computers to the same sensor?

 

That is an interesting problem. I think the solution would be quite a bit more difficult than simply constructing a "pigtail" connector, so bear with me, the technobabble is about to begin.

First of all, terminology is very important. I get the drift about what you are trying to do, but there will always be someone who will pipe up and point out that the terminology is not appropriate and the finger pointing will begin. Let's start with daisy chaining and pigtail connections. What you are trying to do would be best described as parallel input connections, or sharing of inputs to the ECM. Daisy chaining would refer to a series style connection of inputs, which would not be appropriate for your idea. Pigtail connections are best described as a plug for a component with short wires from the connector pins which are unterminated at one end. What you envision would be a "Y" or splitter connection which could be fabricated from 3 appropriate "pigtail" connections.

Sharing inputs to multiple ECM's is not impossible, but there may be design issues within the ECM's which are beyond any practical field solution. Sensors are usually a variable resistance which may be referenced internally to voltages generated within the ECM. Tying the same sensor to two different ECM's will result in two different references applied to the same load and the results would be unpredictable. This makes the idea of simply connecting two OEM Ford EECIV ECM's in parallel unworkable.

When I first read this post, my thoughts were why not a stand alone controller like the Baumann/US Shift product? I expect the same problems as OEM controllers would surface, but perhaps the folks over at Baumann would be able to devise a way for their inputs to simply sample the sensor voltage, allowing the Mustang EECIV ECM to handle the actual input conditioning? FWIW, Ford did make a standalone E4OD EECIV controller which was used to make this transmission work with the mechanically injected IDI diesels.

In the data world, information from sensors is routinely shared between processors using some type of data bus. Newer OBDII automotive strategies allow this. The EECIV technology was not designed with this in mind. One solution that comes to mind would be the Explorer ECM. This, and the 96 5.0 F150 are probably the only OBDII applications developed for the 5.0 V8, but the transmission control was for a 4R70W. (E4OD was available in the F150). The OBDII ECM's are also referred to as EECV in Fordland and have a 104 pin connector instead of the 60 pin connector used with the earlier EECIV ECM's used in our trucks and the earlier Mustang. The case size of EECV and EECIV ECM's is similar. One important difference is that the EECV is flash programmable and while I have not tried this, it may be possible to program an E4OD shift strategy in place of the 4R70W strategy. This demands some programming expertise which I do not have, but is very possible if you have the proper tools and knowledge. Sorry, but I also cannot provide any recommendations as to who would. The EECIV is mask programmed and uses an internal EPROM to define the program. An external PROM is used to make program changes and I am not aware of any such PROM that also allows for E4OD control. Moates seems to be the best source for non OEM EECIV programming.

Another option may be to consider a later EECV ECM that supports MAF and E4OD. Unfortunately, such an ECM was never offered for the Windsor engines, but I have been wondering if the 4.6/5.4 ECM's, which are EECV and flash programmable OBDII ECM's could be recalibrated to run the 5.0/5.8? The Explorer engine likely could supply the required sensors. Wiring this up would be a one off type of project, but with a good understanding of how the system is supposed to operate, it could be done. Just speculation on my part, but something I would certainly like to try.

Good luck!

 

That's something I also thought of, get a Ford computer, reprogram it to have the Mustang throttle and timing characteristics and the E4od shift parameters.
Is it doable?

 

Try Core tuning. Should be some info in this external thread.

Gary's Garagemahal (the Bullnose bible) - Bullnose Forum a3604

 

I emailed Core Tuning, I'll see what they say.
I figure I could get a F150 302 e4od and get it reprogramed to have the Mustang throttle and timing.