Who had drama doing a single conversion....

[Stoffa]

someone had problems doing a conversion and had to get a couple of wires swapped around at the ecu to get the car to run??

cant find the thread anywhere

[94 Leone]

You'll have to swap those if you aren't swapping the ignition coils from direct, to coil pack.

It's all in gazzy2000's electrical conversion guide.

http://www.clubsub.org.nz/forum/index.php?topic=21250.0

IF you're doing it ona bh.

Sent from my GT-I5510 using Tapatalk

[Stoffa]

Im not doing it mostrandomguyaround just did one in a BH, he used an ECU that I sold him (from NZ new auto V5 wrx) and it wouldn't start, and threw a code for fuel pump and had no spark.

He then went and bought a v6 sti ecu and it started first pop. just wanting know what needs doing to use that ecu?

[gazzy2000]

ah yip, think if its an NZ new ECU they have an immobilzer and it cuts the fuel, so the fuel pump feed for fuel pump relay has to be swaped (is on different pin than normal)... is this what you mean

EDIT: i find the pins in a moment

[Stoffa]

thats weird, I thought the ECU's were the same and its the cars wiring thats model specific for the immobiliser. I know my link G4 has both pins wired but my car only uses one pin.

A1 and A21 I think you'll find from memory

[gazzy2000]

 Stoffa said:

thats weird, I thought the ECU's were the same and its the cars wiring thats model specific for the immobiliser. I know my link G4 has both pins wired but my car only uses one pin.

A1 and A21 I think you'll find from memory

yea thats the ones... .. JDMs are a21, NZDM with immobilizer use a1.

If using a NZDM ECU, i am not sure that simply swaping the fuel relay wiring onto pin a1 will make it all work...

there may well be something else that needs doing or a compnent that is missing from the immobilzer system

was that you stoff that leant me that NZDM ECU that time for my BH ST conversion? coz i did borrow one and it was NZ new and didnt work... i.e. didnt prime the fuel relay/pump, but i never investigated further nor did i try to get it gng, i just got a JDM one.

[Stoffa]

yeah thats the same one

[gazzy2000]

 Stoffa said:

yeah thats the same one

bugga, should have nutted it out when i had it aye! would be good to know...

[chrisjunkie]

Actually, the reason it wont start is because the BH's have a fuel pump CONTROLLER. You have to run a wire from the ECU behind the dash to the fuel pump relay. You'll also need to do a loop by the controller too.

See photo here: http://car.chriswiggins.co.nz/Manuals/BH-Fuel-Pump-Diagrams.jpg

You can also see the location of the controller here: http://car.chriswiggins.co.nz/Parts_and_Modifications/

There's heaps of info there that ReubenH and myself collected whilst doing my conversion. Feel free to use it all

Cheers

Chris

[gazzy2000]

Nah not really Chris, this question is based around the fact that the cars wiring is already converted to single (the fuel relay/controller wiring incl) but depending on the ecu used (Jdm or nz) the pin for the fuel relay is either a1 or a21

[chrisjunkie]

AHH right gotcha. The only knowledge I have is of JDM species ;D

[mostrandomguyaround]

Yeah I tried both in 1 and 21 as per the PossumLink diagram. In 1 the pump ran continuosly, and on 21 it didnt run at all and threw the code. But that wasnt the problem, the problem was no spark. I was also under the impression the immobiliser is in the key transponder reciever and the immobiliser ecm, which is seperate to the ECU. It also appears that in cars with immobilsers the crank and cam sensors are switched around for whatever reason. I traced the wires with the possum link diagrams to confirm that my car didnt have an immobiliser installed.

PS, I had already bypassed the fuel pump controller successfully. Also something to note for ya Gazzy. The diagram you have for the fuel pump relay was wrong for my particular car. There are 2 relays, one above the other. Both have a black earth. In the diagram the bottom one is the fuel pump relay, but in my car it was the top relay. Either way, of the two, its the one with the green plug on the back.

PPS, The ECU I bought was a version 6 STi jobby. Along with the STi engine and other bits, this car goes well wicked now

[mostrandomguyaround]

Oh and also, I reused my twin turbo intake manifold with coil over plug. So I had already rewired 1-8-15-20 into 1-8. I went over my wiring so many times I know it all off by heart now oh dear time for sleeep

[gazzy2000]

@mostrandomguy - yea right well i wonder with the NZDM ECU there is like an immbolizer control unit, where by ther ECU has a pin out from 1a to that unit, and from there that unit turns/controls the fuel relay, or something like that

be good to have a NZ new v5/6 WRX wiring diagram....

[mostrandomguyaround]

I tried everything, I even grounded the ecu control wire(ecu earths the relay, not +, to control it) to make pump run. But it was no spark that was my issue. Im sure the immobiliser in these ethat have them controls the fuel pump ?

[Stoffa]

Was reading my G4 link manual the other night and it says the immobiliser model also runs the cam and crank sensors in reverse, theres actually a dip switch so the G4 can run both models

[max.]

Hey there semi related, i am about to do an ecu swap on my nz new 99 ver 6 wrx. I was wondering if you ever figured out the problem with running the ecu? ive read elsewhere that with the audm ecu's they had to change around the cam and crank sensors around pins a5 and a6 on their ecu?

cheers

max