L3YMS

iTrader: (2)

Hiya does anyone have a complete list of Jegs ECU codes and their associated model fuel cut threashold / power / rev limit/ No. of plugs... information. I have found a few but its far from being complete. Seems this could be a really useful list to compile, possibly focused on the classics as they seem to be most likely to be swapped?



U8, W6, 2C - 1993/1994 WRX 11.47PSI
W9 - 1994 WRX RA 11.47PSI
V7, 7D, 6D - 1993 TO 1996 UK/EURO 11.47PSI
SA (STI CHIPPED) - 1993/1994 STI 13.64PSI
SB (STI CHIPPED) - 1993/1994 STI RA 13.64PSI
Z4 - 1995/1996 WRX 12.7PSI
Z5 - 1995/1996 WRX RA 12.7PSI
6K (STI MAPPED, BUT NOT CHIPPED) - 1995/1996 STI 13.64PSI
7K (STI MAPPED, BUT NOT CHIPPED) - 1995/1996 STI RA13.64PSI
PRODRIVE UK ECU (PRODRIVE CHIPPED) - 1994 TO 1996 13.68PSI
1C, 3B, V9, V5 - ALL WRX WAGONS 10PSI, DROPPING TO 6.8PSI

other codes I have found =

3S (looks like a 3 plug?)
my car is a 1998 uk turbo 2000 TD04 wagon and has a 2S- rev limit untested! - max boost seems to be 0.8 bar (11.6 psi) - fuel cut seems to be at 1.05 bar (15.2 psi)- 3 plug- no idea of bhp... 216?






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myblackwrx

iTrader: (1)

JECS not JEGS

92-96 are all 4 plug ecus
After that they are 3 plug

8S is from a UK 97/98 saloon
75 is from a STI 4 (saloon)
6S is from a STI 3 (saloon)
1S is from a STI 3 (wagon)

bugger if i know the specs though

joz8968

iTrader: (13)

lol, beat me to the pedanticness

johnemerson38

iTrader: (1)

hi just had a look at my ecu code and its 4w its a forester s/tb what are my specs for my ecu thanks john

myblackwrx

iTrader: (1)

Can't help with that one perhaps asking on the Forester forum or speak to a guy called 'The Rookie' on here as i think he has a Forester and may know.

L3YMS

iTrader: (2)

okay so i have done some work on the list and added some extra stuff. Like i said there are too many ecu's to cover everyone's needs so i will be focusing on earlier impreza's

U8, 2C - 1993/1994 WRX – TDO5-11.47PSI (0.8BAR) TO REDLINE -FUELCUT 14.5PSI (1BAR) - 240PS (237BHP)

W6 - 1993 WRX RA – TDO5- 11.47PSI (0.8BAR) -FUELCUT 14.5PSI (1BAR) - 240PS (237BHP)

W9 - 1994 WRX RA - 11.47PSI (0.8BAR) -FUELCUT 14.5PSI (1BAR) - 240PS (237BHP)

SA (STI CHIPPED) - VER1 STI (SEDAN AND WAGON)- 14.94PSI

SB (STI CHIPPED) - VER1 STI-RA - 13.64PSI

SC (STI CHIPPED) – SAME AS Z4 - VER2 STI WAGON - -12.7PSI (0.9BAR), DROPPING TO 11.7PSI (0.8BAR) @ 6600RPM
FUEL CUT 15.65PSI (1.08BAR)-260PS (256BHP) - 7250RPM

Z4 - 1995/1996 WRX – SAME AS SC- 12.7PSI (0.9BAR), DROPPING TO 11.7PSI (0.8BAR) @ 6600RPM
- FUEL CUT 15.65PSI (1.08BAR) - 260PS (256 BHP) – 7250RPM

Z5 - 1995/1996 WRX-RA - 12.57PSI

6K - VER2 STI SEDAN – SAME AS PRODRIVE-TDO5- 13.33PSI (0.92BAR) BUT PEAKS TO 13.6PSI (0.94BAR) @ 5600RPM, THEN DROPS TO 12.71PSI (0.87BAR) @ 6600RPM- FUEL CUT 15.65PSI (1.07BAR)-7500RPM-380CC

7K - VER2 STI-RA - 13.17PSI(0.9BAR) BUT PEAKS TO 13.64PSI (0.94BAR) @ 5800RPM- FUEL CUT 15.96PSI (1.1BAR)-


PRODRIVE UK ECU (PRODRIVE CHIPPED) – SAME AS 6K – 13.33PSI (0.92BAR) BUT PEAKS TO 13.6PSI (0.94BAR) @ 5600RPM, THEN DROPS TO 12.71PSI (0.87BAR) @ 6600RPM- FUEL CUT 15.65PSI (1.07BAR)-7500RPM-380CC


1C, 3B, V9, V5 , V9, 4B, ALL(?TBC) WRX WAGONS - 10.55PSI (0.7BAR) DROPPING TO 6.84PSI (0.5BAR) STARTS TO DROP @ 5000RPM – FUEL CUT 13.79PSI (0.95BAR) -


V7, 7D, 6D - 1993 TO 1996 UK/EURO - 11.4PSI (0.8BAR), DROPPING TO 9.4PSI (0.65BAR) @ 6600RPM – BOOST CUT 14.87PSI (1BAR)-

joz8968

iTrader: (13)

My regular 1993 WRX had the W6 ECU - so I don't think it's exclusive to the lightweight WRX Type RA(?). They share the same engines, I think.

jeffwrx

iTrader: (50)

does any one know the difference between the Z5 - 1995/1996 WRX-RA - 12.57PSI ecu and a the z4 form the 1995 wrx , i only ask because i'm running a polar performance chip from a 1995 wrx ra and want to know if its safe to run this in my 1995 wrx?? and if the engines are the same, cheers

joz8968

iTrader: (13)

Yes.

The PP chip's been designed around MY93-96 cars running 380cc injectors and the TD05 16g turbo i.e. all JDM WRX and WRX Type RA saloons from that period.

dj219957

yep w6 ecu is in my 93 wrx and its not a ra

L3YMS

iTrader: (2)

Okay I will edit the list again when i get some more time and repost it. I also want to add the ecu's mentioned before by myblackwrx. I have found some specs for them but need to check them out a bit more.

I started this because my wagon ecu is fairly poor and seems to produce mundane levels of power, as a result I am using an ebc to lift boost to just under fuel cut. Its helped a lot but as you know its not ideal as the fueling probably sucks. I was wondering if there is an equivalent 'z4' type ecu for the 3 plug tdo4 engines, in otherwords one that provides the best 'factory' map for tdo4 power on the cheap, and still claim its basically 'unmodified' for the insurance. I'm guessing the answer is not the sti ecu's as they have different parts (turbo injectors etc. i think) but perhaps the UK saloon ecu? JDM ecu's need octane booster i believe so are also ruled out for me, although i do use shell vpower so i will look into that.
I know i will end up getting a proper set up power fc as for my 98 3 plug this is the best allround performer for the money as far as i can tell, plus everyone knows how to tune it and there is a chance i may be able to eventually work it out and tune it for myself oneday via commander or dataloggit.

myblackwrx

iTrader: (1)

The UK wagon 98 and saloon 98 produce the same power 208bhp.

imo just save your money looking for a better standard ecu and buy for the Power Fc.

L3YMS

iTrader: (2)

oh well another plan foiled! yeah power fc is def. the way to go for me i think. looking at zen performance i think they are called as they are quite local

scoobie_gt

Hi guy's. I really need Your help, My ECU is 9S. what does it mean? I need to change it cause its fried. And i dont know what to buy. I Cant find 9S anywhere on the web so I have to buy different one. Which one will fit to my Scoob?

joz8968

iTrader: (13)

...Also, "JEGS ECU" is an anagram of "EEC JUGS"!

Sprint Chief

The 9S is the ECU from a 97/98 Impreza GT. This is the EU equivalent of the UK turbo 2000.

The ECU is identical to the UK 8S ECU and you can use this. Note that the 8S has a slightly different case (for our right-hand-drive cars in the UK). If you get hold of an 8S you can swap the case over (the circuit board from the 8S will fit in the 9S case just fine).

One slight problem though. These ECUs have a chip in them that must match the chip in your key. So if you buy an ECU you must make sure the two chips match or your car will not work (you'll get the check engine light flashing at half-second intervals). There are a few ways of doing this; 1 - make sure you get the keys (or at least the chips) with the 8S ecu you buy, and swap them over; or 2 - take the car to a subaru dealer and get the keys coded to the ECU.

Are you sure the ECU is toast though? The ECUs are usually pretty reliable.