Hijacking oem efi

[swagaero]

Tom Cloud wrote:
> 
>  ....... the other responses (.....................) .... sound
> >like someone doing this for commercial gain. I would like to see
> >the info on a board archive, similar to the '332 project. You
> >seem to be tho only one with such a project.
> >
> >The only problem with the ford unit is that the EPROM is not
> >accessable, so any reprogramming has to either melt the potting
> >or fool the inputs. Is that right?
> > ....
> 
> WRT your question about removing potting, etc .... no, I don't
> think that's the case -- nor do I think Terry's assertion about
> 7-layer boards is the real hang-up.  Apparently some have
> rev-engineered the GM unit -- though I can't get anyone to
> share  8^(
> 
> The EEC-IV is not potted, nor is its board difficult -- other
> than the normal PITA of tracing traces, as far as I can see.
> The problem lies in that they use proprietary chips -- cpu, eprom
> and ram.  I think we've got the cpu fairly well figured out, but
> the eprom and ram have on-chip decoding of some sort and on-chip
> i/o .... so, there's nothing I know of commercially available
> that could be put in it's place so we can take control of that
> irritating piece of metal, glass and plastic !
> 
> I've been saying what you proposed for some time -- use an
> existing platform (hardware) to implement our software (and
> if we "accidently" stumble onto some software algorithms that
> we "accidently" use in our system, then all the better -- after
> all, we'd probably only be re-using algorithms that were already
> in the units we bought anyway .... )
> 
> The EEC-IV has a "service port" that has a line that disables
> memory and used memory connected to that port.  I don't know the
> particulars of this but you'll soon see the name of Mike Wesley
> pop up.  Mike has built and talked up a device he calls a "calibrator"
> that plugs into that service port.  Problem:  Mike's been talking
> about this for maybe two years and, AFAIK, has never delivered
> even one !!   You say you've done controller design, and I have,
> so I can understand the problems he must be having (he says that
> his unit works with Intel and Toshiba processors but won't with
> Motorola ... and who knows what other problems he's encountered)
> but he's angered lotsa people who've put off doing things waiting for
> this device.  Then, you'll run into those that are licensed by Mike
> (like Matt Happy of Auburn Performance Equipment -- "APE" out of
> Nasty-chussetts) that make "chips" that plug into the service port.
> They burn these chips for about $250, I'm told, and I hear they work
> okay -- but it's a one-time deal done by someone else.
> 
> One solution is to put a hardware/software device in-line with
> the ecm to change what it sees to force it to do what you want.
> The problem with this, as I understand, is that the Ford EEC is
> quite sophisticated with an "adaptive" control algorithm that
> lets it modify its operating parameters to compensate for
> aging of sensors, driver characteristics, road conditions, etc.
> So, the EEC is apparently not a candidate for this type of
> control.
> 
> My (current) feeling about this whole mess ??
> 
>  - I own Fords, hence my irritation at not being able to modify
> the controller, so I'll probably continue trying to mess with it
> 
>  - I recognize the immensity of the task
> 
>  - seems that we really need to either find hardware platform
> (maybe GM ??) or build our own (EFI-332 ??) and make matching
> cables to mate up with our stock systems.
> 
> Bottom line .... I'm frustrated.  Not enough time ... shouldn't
> have to spend the time -- the danged manufacturer should be
> tickled pink to sell me something so I can fiddle with my car
> (look in the Summit catalog -- Mopar is doing just that !!) and
> GM at least uses reasonably standard components that aren't soldered
> into the danged PCB!!
> 
> Anyway, I'll be glad to share with you what I have.  Like you say,
> it's frustrating to have people wiggle the carrot in front of your
> face and then find out they want money  .... that's okay, but they
> ought to get off the "diy" list !!!!!!!!!
> 
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> 
> Tom Cloud


Tom I spent 2.5 years doing what I did with the GM ecms so to honest
with you I am not going to give it away. Have you thought about just
taking a GM type ecm and modifing the fuel curve and then addin the op
amp to the map circuit. If you want me to leave.

Steve