Engine/Transmission (1998.5 - 2002) Lets make a custom ECM

[Diesel Freak]

Vaughn, I am not using those two parameters for two reasons... simplicity, and they are not needed..... 12 valve engines dont use them. I know it will smoke... oh well.

 

[rono]

You guy are talking another languange , can-bus, J this J that, Intel A28f400FBR. It sounds logical and I would be for it. Wish I could help. I'll keep watching.

ron

 

[Gizmo 007]

you guys are nuts

lol. I love it. I'm not nuts. I passed that stage years ago . So what if we are eccentric, maybe even a little crazy, at least everyone else will get a good laugh at our attempts .



Never give up, Never surrender!

 

[Diesel Dan]

I can help with the electroincs!

I own a small electronics company and can get my hands on any chip that you need. As this is a new and severly underfunded company my funds are very limited but i will do what i can to help.



Marco, i can export to italy if you need anything electronic.



lets roll



Diesel Dan



-- email address removed --

 

[Diesel Freak]

rono:



CAN Bus: an acronym for Controller Area Network



J1939: a 29bit computer protocol that the ECM uses to talk to the Injector pump and any other device on the CAN



Intel A28F400BR: a computer chip... more specificly, Smart Voltage Boot Block Flash Memory.





Diesel Dan:



I think we are looking at a total of about $500 in total hardware, and the Flash should be real cheap in todays market... no more than $16



I am just going to need help with the programming.

 

[Gizmo 007]

I'm working on some different mapping schemes. Anyone have any info on the VP-44 such as volume, rate of flow, timing, etc?



I need to go to a salvage yard and rob a pump, ecm, and wiring harness to play with. This could get fun right quick and in a hurry like.

 

[Diesel Freak]

 

[TxDieselKid]

is this a dumb idea???

Ok lets see here. We can not put a cummins ECM on because we will have trouble taking to the PCM which we need to control the gauges and transmission right?

sssssooooooo, we take a PCM from a 12v when there was no ECM, and it was all there was, and then we put on a cummins ECM.



Am I really just wishful thinking(dumb), or could this work?



AJB

 

[Todd T]

have you looked here?

try these for the adapters you are requiring.



http://www.ni.com/automotive/ http://www.bb-elec.com/

 

[Diesel Freak]

Todd T..... I think us nutcases think alike... the J1939/rs232 interface "looks" like it is the answer..... bypass the ecm and use a laptop as a stand alone ECM. Save the data from a complete dyno run... . and write a program for the laptop according to the data.



just one problem... ... since we will still using the CAN we would need to download the maps in the VP44 also, and write a program according to those maps.

 

[Gizmo 007]

So what are we waiting for?

 

[TxDieselKid]

I need a money tree yes I do, I need a money tree how bout you???

I still like my idea about getting an old PCM with a Cummins ECM so they dont have to talk to each other.



But I think some $ is what is lacking with the current ideas... .

$500 for mother board,

$200 for J**** conector,

etc...



I would love to play with the ecm, sitting on the bus this morning, the driver put it in park, and it started a high idle cause it was cold. I though man if we could play with the ECM that would be it.



AJB

 

[Gizmo 007]

Here's a point to ponder ...

Even if we use an old standalone PCM with a Cummins ECM, we have two problems.



1) The transmission is gonna shift kinda funny with a different computer,

2) How do you plan on getting the gauges, Voltage regulator, etc to work with a 200 pin Cummins ECM and Cummins software vs. Chrysler ECM and Chrysler PROPRIETARY software? Custom wiring harness? I dunno.



Just curious. I'm looking into it, but the Dodge gauges etc are going to be tricky. Know of a good salvage yard where we can get some test parts?

 

[TxDieselKid]

Someone did see my post...

Well now this is what I have been wondering. We don't need no stinking PCM because a TH 350 auto transmission can work without a computer so why couldn't ours? Or would we have to change out the transmission too?



As for the gauges? They can work on a mechanical basis can't they? I know a speedo, fuel tank, oil pressure, and others can work with out a computer, look at cars before they had computers.



This is just a thought that I had one day.



AJB

 

[jmeehan]

I've thought about different ways to get around DC and their version of the ECM.

How about using a Cummins ECM from another application, with all it's features (high idle, cruise, PTO etc. ) and fabbing a wiring harness for our Rams. I cann't program a computer, I'm a nuts and bolts guy, but if you can make an interface for the Cummins ECM and the DC PCM for the gauges, auto transmission and ABS you may be miles ahead.

Someone that knows more about our truck computers please tell me where I'm wrong. I'm thinking of going this route, installing mechanical gauges and disabling the ABS in a few years.

 

[Gizmo 007]

Sheesh, why didn't we think of that ? We've been at it for a week or two, then here comes someone with a plan out of the blue.



I don't see why that wouldn't work. As long as we can find the pinout diagrams for both ECMs, we should be able to make it work. Nothing wrong that I can see, IF we can keep the two boxes from fighting over the pump.



Good show

 

[jmeehan]

I've been thinking about this since I read a post here about the factory Cummins 100 pin ECM's. Since Cummins runs the ISB 5. 9 in a variety of applications with that ECM I figured it ought to run our trucks, it's just a matter of getting the Cummins ECM to talk to the DC PCM. I wouldn't think we'd need the DC ECM at all, the Cummins ECM would handle the engine side of things, hence no fighting over the fuel pump.

 

[Diesel Freak]

TTT

thought I would try and revive this one also

 

[Mschevey]

I have been woorking on this for a while. I have the wiring diagrams for both ECM's. Thanks to another member of this site. I have the wire rerouting figured out.



The plan I have is to put a Cummins 100 pin ECM on the engine. This uses two 50 pin connectors. Use a interconnect cable to go into a "black box" where the wires are re arranged to 'talk to' and connect to the apprpriate wire and connector types to relate to the Dodge wiring harnes.



The problem I have is finding a supplier for the 50 pin connectors that cummins uses. I need them as an inline version and pannal mount version.



If you guys can find them then we can go to any Cummins Shop and have any of the features in the Cummins ECM changed. We can also get rid of the fan clutch and use an electric clutch. high Idle = no problem, Etc. ...



Let me know what you think.



Mike

 

[Diesel Freak]

sounds great





you have mail