how can i indentify a 98wrx ecu and fit it to a uk wiring loom?
 

ive got 98 uk subaru running gear in my project car but i havnt got the transponder key so i carnt get it running, a couple of people on here have said that i can change the ecu for a 98 import unit, the bloke that a brought it all off said he will swap my uk ecu for the wrx version but i want to make sure i get the right one so does anyone know what the code or serial number is please? also do i need to buy anything else? ive been told i need to change some of the pins in the ecu to get this to work but i dont really understand exactly what i need to do, is this something i can do myself?

thanks for any help. james

Hi James,

Sorry for not answering before via pm, have been on holiday.

ECU
At the input to the ECU you have a Cam sensor signal wire and a Crank sensor signal wire these need to be swapped with each other i.e replace the crank signal wire with the cam signal wire and cam signal wire with the crank signal wire.

The only thing I dont have is the pin outs for a 97/98 ecu but I am sure someone else could help out.

Do you know the code on the ecu casing your thinking of getting.

Az

Altight Az

Thanks mate, that sounds quite simple so its just a matter of plugging in the wrx ecu and swapping the 2 wires.. im not sure of the code of the wrx ecu yet, im going to pick it up saturday along with some other bits and bobs. heres a link that Simon (jolly green) posted in projects...

http://dspace.dial.pipex.com/bob_raw...ts/MY97ecu.pdf

thanks james:thumb:

James, you probably need to sort out the fuel pump wire, as it's likely to be the same as fitting an apexi ECU into a UK car, see https://www.scoobynet.com/general-te...pexi+fuel+pump

cheers Scott, someone says on that post about the fuel pump wires...

quote.... Doing a bit of research... on connector 137, change pin 17 to 7.

now does this mean swap them for each other of fit one in place of the other?

Ive got one here from when it got taken out and a GEMS put in, PM me and we can come to an arrangement ;)

You may find that you can swap the wires under the bonnet for the cam and crank, but don't qoute me on that

You just move it AFAIK. Simon normally releases it with a paperclip then clips is into the other location.

cheers mate but im just swapping the one ive got with the bloke i brought it off. what is the code of it though? i just want to make sure i get the right one.

as said a paperclip is the best tool for the job.. special tool alert.. no not me the paper clip.

you pull up the back of the connector and then look in through the front of the plug and you will see a little kind of button.. you need to press this with the paper clip and wiggle the wire / pin and it should then come out the back of the plug.

Simon

my 97 wrx ecu case :D

http://img.photobucket.com/albums/10...y/Photo002.jpg

probably be the same (phase 1.5) etc etc

Brilliant !. thanks for the help i know exactly what to do now. ;)

james:thumb:

ive just thort, does this mean im going to be running the wrx map? do they run a bit more power than the uk's, obviously with a higher octane fuel?

hold on.. the MAF on the uk and WRX are very different.. you need a WRX maf too.. :rolleyes: and even then the turbo is different.. this gets worse

Simon

DAM:wonder: i could do with getting this sorted because im going to swap the ecu in the morning and its a bit of a drive, wouldnt the turbos both be td04's on the uk and wrx? is there a difference in the maff too then?

james

the maf housing is larger on the wrx and sti..

wrx has a VF turbo.. uk td04.. until 99 when they both had the td04 fitted.

This is where the extra power comes in.. the bigger turbo and different map...

Simon

I thought it was only the sti that had the larger dia maf housing?

Whats the actual difference between the uk & wrx maf?

no the wrx has larger housing too..

the size of the housing is the main if only difference..

Simon

and injectors.... 380cc vs 440cc

im not that fussed about the turbo at the moment as i just want get it runing for the time being, i could always get a vf turbo later on but i would like to get the maff issue sorted now and what ever else i need to do.

thanks

that doesn't seem clear cut... seen some with 380cc still..

Simon

then you need a JDM maf.. and pipework will need altering to fit it..

Simon

ok i will see if he has a maff too then i hope so:p

cheers james

alternative would be to buy the jdm ecu and maf.. and keep the uk one and try and sort the immobiliser issue.. must be a way around it.. just not likely to be public knowledge for obvious reasons.. but at least with maf and jdm ecu and wiring changed you can get it running to eliminate that as an issue if it doesn't start straight away etc..

Simon

yeah that sounds like a good idea, at least i can get it running for the time being,the car is only a track car anyway. the 97/98 spec seems to be a rite pain with this built in imobilizer, i carnt understand it though because i rang a breakers and they had 2 uk 97/98 imprezas that were stolen and recovered so there must be a way to get them started.

probably broke into house for the keys :(

True, just out of interest, do you know if this has been done before?

Not sure if this is the guy or not, but iirc, there was someone who can take the immoboilisation out of the ecu The ECU Doctor

If not, maybe if you have the OBD socket and the transponder aeriel, then you could just tape a key to it.

I bought a forester without keys (someone pinched them) I got a key from subaru and they coded it in for free, ok, you will have to tow the car to them, but with the ecu OBD socket, it will take the whole of 30 seconds to program the new key in.

Saves all the messing of guessing what injectors, turbo maf the Jap car had that the ecu came out of

97 uk and 97 wrx MAFS ;)


http://img.photobucket.com/albums/10...cky/Maf004.jpg

http://img.photobucket.com/albums/10...cky/Maf003.jpg

:D


not seen a later wrx with the smaller injectors yet TBH!!!

sound mate, the wrx looks quite a lot bigger, are the connectors the same?

whats the obd socket mate? subaru wont reprogram it because its not a proper subaru its just the running gear in another car. ive got in contact with the ecu doctor that you recomended and they have give me a few numbers to call monday. thanks