12 replies to this topic

[rozzer1275]

Is it posible to have an SPi ECU remapped?
If not what are the options for changing the ecu to a programable type?
preferably one that can use the exsiting sensors and has the same multiplug.

Thanks

[KLAS]

Is it posible to have an SPi ECU remapped?
If not what are the options for changing the ecu to a programable type?
preferably one that can use the exsiting sensors and has the same multiplug.

Thanks

its not possible to my knowlege

you may get an ums ecu, its made to do just that

[rozzer1275]

Is it posible to have an SPi ECU remapped?
If not what are the options for changing the ecu to a programable type?
preferably one that can use the exsiting sensors and has the same multiplug.

Thanks

its not possible to my knowlege

you may get an ums ecu, its made to do just that

yer, someone was going on about mapping the standard ecu the other day, didnt think anyone had broken that force field!!!!

ums great i will look it up.

Thanks.

[phil242]

Hi,

The ECU of the SPI have a an Intel processor with the code inside, means it's impossible to read it and overwrite it.

The MPI isn't in the same case: the processor is a Motorola, and the code is in an PROM just beside. Means, you can unsolder the PROM, replace it with an EEPROM and try to remap the injection.

(I'm not in this business, my everyday job is computer, and was by past electronic ...)

Phil

[Sprocket]

You still need the software that will understand which bits of memory are used for which bits of the software/ firmware

[phil242]

Hi Sporket,

Yes, I have start the reverse of the ECU, but it's a mad job: The PCB where the components are soldered is multi-layer, it's impossible the follow a path between connector and PIN of the MCU.

I have the dump of a MPI prom, it's Motorola instruction set. I have start to disassemble the machine code, to try to understand how it goes, but without success yet.

I don't know if people have tried this job, but if yes, I'd be happy to be in touch.

I bought on Ebay a second MCU, from a crashed MPI, here is the photos of the CPU+PROM+EEPROM (for faults codes, setting like idle, lucas 5AS security etc.): LINKS 1
Here, some more general picture of the ECU for a clear identification if needed: LINKS 2

I can send the PROM dump if someone interested. The tool called IDA-PRO can show you the 68K instruction set.

Phil

[KLAS]

it has been done over here.
normally you remove the atmel prom, solder a socket in place, use an emulator to mach the tables to the engine at a dyno, burn a new atmel with the new data, place it into the socket.

and there is special software to read, modify and write the data. its just the same like any other engine management system with external rom

[phil242]

Hi Klas,

I'm interested in this, do you have an URL or can you point me some posts on this subject ?

Thanx

Phil

[KLAS]

don't know if there is anything online regarding the Mini.
but if you look around how it is done for other manufacturers you can adapt it to the Mini.
tools are an universal programmer, like GALEP-4, and software, like WinOLS.

[rozzer1275]

Thats intresting

I used to help a friend of mine program chips for nissan 200sx s13 (well keep an eye on the lambda and revs etc), I remember him saying it was eprom, (i'm not that good with pc stuff), I remember he had to solder in a jack for the chip, which he could then plug in new writen chip or a lap top and run the car from that, i remember it was a pain to write the chips, always problems with the eprom reader and software etc.

wonder how rover programed the spi ecu's

[KLAS]

the SPi is a different story. the rom is part of the processor. so you would have to programm a new processor with everything and fit it to the pcb.
no problem for a manufacturer
biggest problem is that Rover/Motorola used chips that can be programmed only once.
more modern ecus can be reprogrammed without opening even the box so the maker can update it, and this way can be used for modifications, too.
a thing in the middle is an ecu with already socketed rom, you can just replace it with a new one (some Bosch ecus are this way)

[grimspeed]

I'v got a fully programmable 3d ECU and 50mm throttle body on my stg 3 1380 MPI !

Same or similar kit for SPI available from Specialist Components !

[FlyingScot]

 image.jpeg   43.94K   3 downloads

Just why?

FS