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-   -   Not running after 8S-6S ecu swap (http://www.perth-wrx.com/vb/mechanicals/77184-not-running-after-8s-6s-engine-control-unit-swap.html)

Mrbas11 30-07-2020 03:36 PM

Not running after 8S-6S ecu swap
 
Hey all, I own a 1998 with a full sti engine/gearbox swap from a v3 sti, when I bought the car it was running the 8S ecu and the previous owner gave me the 6S ecu but couldnít get it running with that ecu, Iíve gone to do the ecu swap and noticed pin 17 on plug b137 was merged with a blue wire, so I disconnected that and put it to pin 7, and have swapped 8 & 10 on b136, plugged in the ecu, it starts but it automatically shuts off after 5 seconds, does anyone know what this issue is & how to fix it? Thanks in advance

Mrbas11 31-07-2020 02:54 PM

Anyone? Have installed an Orange stickered afm/maf and now it won’t even start, it started once or twice and when it did it sounds like the engines bogging out and then the automatic shut off kicks in still, was previously running with 8S ecu and F (blue) afm/maf

Mrbas11 31-07-2020 04:55 PM

Have plugged the black ‘read memory’ plugs under the dash together to run diagnostics mode and check for any faults shown, I’m just getting continuous same speed flashing/no faults shown..

Brett Allan 31-07-2020 06:57 PM

Not sure with the earlier models, but with the GD's etc if you swap the ECU, you will need the key and transponder from the donor car as they are coded...

Sent from my SM-N976B using [URL=http://r.tapatalk.com/byo?rid=78089]Perth-WRX mobile app[/URL]

matto20v 31-07-2020 08:14 PM

Brett, I think that came in for the 99/00 models, I think...

MrBass11, what do those pin numbers correlate to? Just exactly what is it you have merged or swapped around?

Mrbas11 31-07-2020 11:45 PM

Crank and cam sensor pins swapped and the fuel pump pin moved to pin 7 (jdm/without immobiliser position), the same pins that get swapped when installing an apexi ecu

[url=http://www.southeastscoobies.co.uk/vbulletinforum/showthread.php?p=217011]MY97/98 ECU Pin-out & Apexi Fitting - South East Scoobies[/url]

And I used this to get into diagnostics mode
[url]http://www.perth-wrx.com/vb/stock-ecu-discussion/30024-how-read-subaru-cel-gc8-stock-engine-control-unit-only.html[/url]

Hurtenstein 01-08-2020 12:05 AM

running for 5 seconds then stalling is an immobilser issue.

Mrbas11 01-08-2020 02:52 AM

I was under the impression the JDM version doesn’t have the immobliser function

Mrbas11 01-08-2020 12:27 PM

I just realised my key/car has the immobliser installed, would I need to bypass/remove the immobliser system to allow the car/engine to start with this ecu, and then I wouldn’t be able to reuse the factory immobliser and would have to fit an aftermarket immobliser/alarm/tracker?

Tony 01-08-2020 01:26 PM

Just get an aftermarket ECU


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