Welcome to the North American Subaru Impreza Owners Club Sunday December 28, 2014
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Technical > Normally Aspirated Powertrain

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 09-06-2005, 09:04 PM   #1
t3hWIT
Scooby Guru
 
Member#: 58779
Join Date: Apr 2004
Chapter/Region: MAIC
Location: **** Town
Vehicle:
95 STi RA (rhd)
98 Tacoma (300k Club)

Default 95 1.8L - SAFC2 install???

Yesterday, after over a year and a half of debating (and deciding if its worth the money) I finally broke down and bought an Apexi S-AFC II, which teamslow wrx has up for sale. I thought great. Now i can tune for my basic mods and i have something to adjust in the long run.

Then it hit me. How the hell do I wire this thing? I mean im seeing posts on it being installed on newer RS's, but this is a 95 1.8L. I haven't been able to find much about the install on these engines. Now I obviously didnt receive it yet and dont know what all has to be wired, but I know it has to be wired to the ECU... which is another thing. I'm having a hard time finding a reliable ECU printout.

With that, any help would be appreciated.

thanks

-shaun
* Registered users of the site do not see these ads.
t3hWIT is offline   Reply With Quote
Old 09-07-2005, 10:34 AM   #2
leondal
Scooby Newbie
 
Member#: 43114
Join Date: Sep 2003
Location: Pownal, VT
Vehicle:
1998 Legacy GT Turbo
Green

Default

There are definitely wiring diagrams online for your ECU.

I can't remember where I got mine, but it wasn't terribly
difficult to find.

The actual wiring was pretty easy, too. Just remember that
you have a hotwire type maf sensor. The booklet will
tell you what color wires go to which wires on your harness,
you just need the wiring diagram to show you which wires
in the harness are your knock sensor, maf sensor, power,
throttle sensor, and rpm sensor.

And, yes, it made a hell of a difference, especially above
4000 rpms, where the car was running incredibly rich.

Good Luck!
leondal is offline   Reply With Quote
Old 09-07-2005, 10:58 AM   #3
t3hWIT
Scooby Guru
 
Member#: 58779
Join Date: Apr 2004
Chapter/Region: MAIC
Location: **** Town
Vehicle:
95 STi RA (rhd)
98 Tacoma (300k Club)

Default

Sparky280 sent me a pdf diagram of the ecu wires and what sensors they go to. with that said this doesn't look too bad...
t3hWIT is offline   Reply With Quote
Old 09-07-2005, 12:21 PM   #4
mnlegacy
Scooby Newbie
 
Member#: 94787
Join Date: Aug 2005
Default

could someone send me the same pdf?
mnlegacy is offline   Reply With Quote
Old 09-07-2005, 02:54 PM   #5
t3hWIT
Scooby Guru
 
Member#: 58779
Join Date: Apr 2004
Chapter/Region: MAIC
Location: **** Town
Vehicle:
95 STi RA (rhd)
98 Tacoma (300k Club)

Default

sure. pmd yah
t3hWIT is offline   Reply With Quote
Old 09-07-2005, 03:14 PM   #6
Jaxx
NASIOC Supporter
 
Member#: 177
Join Date: Aug 1999
Chapter/Region: NWIC
Location: Boise,Idaho,USA
Vehicle:
The 93 Imp W/EJ20K
flat black

Default

so do you have access to a wide band o2 .. w/o one an safc is a blinky light tool
Jaxx is offline   Reply With Quote
Old 09-07-2005, 03:43 PM   #7
t3hWIT
Scooby Guru
 
Member#: 58779
Join Date: Apr 2004
Chapter/Region: MAIC
Location: **** Town
Vehicle:
95 STi RA (rhd)
98 Tacoma (300k Club)

Default

no. its a blinky light tool. im on a college buget and a 500 wideband unfortunatly is out of my price range. id sure a hell love to have one thoh, and i am aware of its importance tuning-wise. i just cant afford it right now.
t3hWIT is offline   Reply With Quote
Old 09-07-2005, 04:10 PM   #8
Sparky280
Scooby Newbie
 
Member#: 69896
Join Date: Sep 2004
Chapter/Region: NWIC
Location: Tumwater, WA
Vehicle:
98 WRX Swapped "L"
VF39 294HP/277TQ @19psi

Default

just do the blue wire mod for a quick tune, until you can afford a wideband, or pay $$ to get dyno tune, i hear you get the most out of your AFC with a dyno tune.. i wouldnt know either cause i'm also poor...
Sparky280 is online now   Reply With Quote
Old 09-07-2005, 04:29 PM   #9
t3hWIT
Scooby Guru
 
Member#: 58779
Join Date: Apr 2004
Chapter/Region: MAIC
Location: **** Town
Vehicle:
95 STi RA (rhd)
98 Tacoma (300k Club)

Default

now what exactly is this blue wire mod? ive searched it a couple different ways and from what I'm seeing is that you connect the extra MAF wire to the o2 sensor wire. im guessing on that one its meant for the front one (if this car also has two). however, im looking at voltage suggestions and the first one i saw was .78 as typical. but then i got different numbers as alot of people are thinking different things as far as that goes. any suggestions?

as far as anyone else needing diagrams, I have some from BeachBum and Sparky280 which i am willing to send to anyone who needs it. that would of course be through email.
t3hWIT is offline   Reply With Quote
Old 09-07-2005, 05:23 PM   #10
Sparky280
Scooby Newbie
 
Member#: 69896
Join Date: Sep 2004
Chapter/Region: NWIC
Location: Tumwater, WA
Vehicle:
98 WRX Swapped "L"
VF39 294HP/277TQ @19psi

Default

yeah the blue wire mod is connect the extra MAF (blue wire) to the front o2 sensor on your ECU, and the typical stoich voltage of what i have read is .84v there's a few websites that have info on tuning with blue wire mod, just search google for it, there not for tuning a suby, i think there's a site on tuning an eclipse but it gives you a basic idea of how to do it.
Sparky280 is online now   Reply With Quote
Old 09-07-2005, 05:27 PM   #11
t3hWIT
Scooby Guru
 
Member#: 58779
Join Date: Apr 2004
Chapter/Region: MAIC
Location: **** Town
Vehicle:
95 STi RA (rhd)
98 Tacoma (300k Club)

Default

ok. il do that. now this blue wire mod is my ghetto wideband? i mean is this how im going to tune it?
t3hWIT is offline   Reply With Quote
Old 09-07-2005, 05:55 PM   #12
BlkTS02
Scooby Specialist
 
Member#: 50142
Join Date: Dec 2003
Chapter/Region: South East
Location: West TN
Vehicle:
2002 2.5TS
MBP

Default

Yup, set the SAFC to display "sensor chk". Ideally you'll want to adjust the a/f ratio so the sensor voltage stays around .84v at wot.
BlkTS02 is online now   Reply With Quote
Old 09-07-2005, 07:10 PM   #13
t3hWIT
Scooby Guru
 
Member#: 58779
Join Date: Apr 2004
Chapter/Region: MAIC
Location: **** Town
Vehicle:
95 STi RA (rhd)
98 Tacoma (300k Club)

Default

yet another thing. the car this is being installed on is a 95 1.8, which i dont actually have in my posession yet. im going back home on saturday to pick it up, and then mod it the second weekend after. (mods salvaged off my 97 2.2L)

my question is, is this an OBD 2 car? sure its a 95, but it shares the same basic body style (that has proven to be important, worked at Autozone, checked CELs), and ive seen sone obd2 cars as far back as 93. is this one of them? i know it has a port there, but im not exactly how the ECU is set up...
t3hWIT is offline   Reply With Quote
Old 09-07-2005, 11:46 PM   #14
2slofouru
NASIOC Supporter
 
Member#: 90539
Join Date: Jul 2005
Chapter/Region: South East
Location: somewhere east of CA
Vehicle:
95 L with ej257k
powa, Raven R6

Default

My 95 is OBD 1 and you check by using the black connectors next to the steering column. Check the ravensblade website and they have the ecu pinout. It is for a 93 but mine was the same and it's 95. The diagrams even tell you the voltage the wires are at so you can check them to verify they are correct.
2slofouru is offline   Reply With Quote
Old 09-09-2005, 09:45 PM   #15
Jaxx
NASIOC Supporter
 
Member#: 177
Join Date: Aug 1999
Chapter/Region: NWIC
Location: Boise,Idaho,USA
Vehicle:
The 93 Imp W/EJ20K
flat black

Default

NONO NO
the blue wire mode is worthless

A narrow band sensor basicly reads 3 states leaner than 14.65 ,14.65 and richer than 14.65

that said a car makes th most power at some where between 11.5 and 12.5 to 1 .. a narrow band sensor won't read below 13.2 at all
Jaxx is offline   Reply With Quote
Old 09-13-2005, 11:49 AM   #16
t3hWIT
Scooby Guru
 
Member#: 58779
Join Date: Apr 2004
Chapter/Region: MAIC
Location: **** Town
Vehicle:
95 STi RA (rhd)
98 Tacoma (300k Club)

Default

got another question here dealing with spark plugs and detonation. keeping in mind i dont have access to a wideband, i have to rely on the blue wire mod, as suggested by most.

my question is, to avoid detonation, should i go one step colder as far as spark plugs go? i know it is suggested for major mods such as boost/nitrous, and this is a somewhat minor mod, but would it help as far as avoiding detonation? current mods for the car are intake and exhaust for now.
t3hWIT is offline   Reply With Quote
Old 09-13-2005, 03:55 PM   #17
jamp555
Scooby Newbie
 
Member#: 80754
Join Date: Feb 2005
Location: Sheffield Uni / N Wales, UK
Vehicle:
1995 Impreza 1.6GL
Silver

Default

I'm also fitting an S-AFCII to my 95 UKDM 1.6GL AWD and the unit arrived today. My ECU says this on it:

N3
22611 AA780
MECF-B10 E1 4228
Hitachi, Japan

Is that the same as in a 95 1.8? (I believe the 1.8 and 1.6 are the same engine except for con-rod length, correct?) If so could I have the PDF wiring diagram too please?

Thanks,

Ben
jamp555 is offline   Reply With Quote
Old 09-13-2005, 06:26 PM   #18
t3hWIT
Scooby Guru
 
Member#: 58779
Join Date: Apr 2004
Chapter/Region: MAIC
Location: **** Town
Vehicle:
95 STi RA (rhd)
98 Tacoma (300k Club)

Default

Quote:
Originally Posted by jamp555
I'm also fitting an S-AFCII to my 95 UKDM 1.6GL AWD and the unit arrived today. My ECU says this on it:

N3
22611 AA780
MECF-B10 E1 4228
Hitachi, Japan

Is that the same as in a 95 1.8? (I believe the 1.8 and 1.6 are the same engine except for con-rod length, correct?) If so could I have the PDF wiring diagram too please?

Thanks,

Ben
dude, as far as that goes, i didnt know they made a 1.6

i would look it up on alldata, but thats usdm. if you want the diagrams thoh, i have a few here.
t3hWIT is offline   Reply With Quote
Old 09-13-2005, 06:41 PM   #19
99subi
Scooby Guru
 
Member#: 78118
Join Date: Dec 2004
Chapter/Region: Tri-State
Location: Westchester NY
Vehicle:
2002 Corvette coupe
05 Legacy

Default

they make a 1.6 in other countreis
99subi is offline   Reply With Quote
Old 09-14-2005, 07:03 AM   #20
jamp555
Scooby Newbie
 
Member#: 80754
Join Date: Feb 2005
Location: Sheffield Uni / N Wales, UK
Vehicle:
1995 Impreza 1.6GL
Silver

Default

Quote:
Originally Posted by mi_cistemz_loudr
dude, as far as that goes, i didnt know they made a 1.6

i would look it up on alldata, but thats usdm. if you want the diagrams thoh, i have a few here.
Yep the 1.6 sold better than the 1.8 in the UK, despite the lowly 88bhp! We had them in bug-eye shape too but now there are only 2.0 N/A or Turbo and we're soon to have the 2.5 STi.

If you have a diagram for an EJ18 with an N3 ECU that would be very useful, cheers.
jamp555 is offline   Reply With Quote
Old 09-14-2005, 08:04 AM   #21
t3hWIT
Scooby Guru
 
Member#: 58779
Join Date: Apr 2004
Chapter/Region: MAIC
Location: **** Town
Vehicle:
95 STi RA (rhd)
98 Tacoma (300k Club)

Default

bit sure what u mean about the N3 ecu. how would i tell?

also, im bumping the spark plug question from post #16.
t3hWIT is offline   Reply With Quote
Old 09-14-2005, 12:09 PM   #22
jamp555
Scooby Newbie
 
Member#: 80754
Join Date: Feb 2005
Location: Sheffield Uni / N Wales, UK
Vehicle:
1995 Impreza 1.6GL
Silver

Default

There is a sticker on the ECU, they are generally known by the 2 digit code in the top left corner, N3 in my case. Here's a pic of mine:
http://members.lycos.co.uk/subaru/scoobynet/Ecu.jpg

Sorry I don't know about your spark plugs idea. I wouldn't want to risk it as an alternative to wideband tuning though. I've been told the S-AFC can only take an hour to dyno tune - if that's true it'll cost me 75 or ~$140, a price worth paying I think especially as I'll get before and after power graphs so I'll know whether I've wasted my money or not
jamp555 is offline   Reply With Quote
Old 09-14-2005, 05:43 PM   #23
t3hWIT
Scooby Guru
 
Member#: 58779
Join Date: Apr 2004
Chapter/Region: MAIC
Location: **** Town
Vehicle:
95 STi RA (rhd)
98 Tacoma (300k Club)

Default

just noticed... the safc i have has 11 wires, not labeled, nothing in the manual. anybody have a diagram of what they're supposed to go to?
t3hWIT is offline   Reply With Quote
Old 09-18-2005, 11:59 PM   #24
t3hWIT
Scooby Guru
 
Member#: 58779
Join Date: Apr 2004
Chapter/Region: MAIC
Location: **** Town
Vehicle:
95 STi RA (rhd)
98 Tacoma (300k Club)

Default

Hopefully the last question, as the install is this coming weekend.

The safc has a wire for the knock sensor. the 1.8 doesnt have it. can this still be installed correctly, albet with more minor tuning?

or should i/could i pul the one from the 2.2 and somehow get it working...

um... help?

im assuming that i just dont use the knock sensor wire, but i wanted to run it by you guys first.

thanks for all the help here
t3hWIT is offline   Reply With Quote
Old 09-23-2005, 10:43 PM   #25
t3hWIT
Scooby Guru
 
Member#: 58779
Join Date: Apr 2004
Chapter/Region: MAIC
Location: **** Town
Vehicle:
95 STi RA (rhd)
98 Tacoma (300k Club)

Default

Installed. Had a problem, fixed it, but now I am in limp mode. Performed a search, couldn't find anything helpful, how do I get out of it?
t3hWIT is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
95 1.8L for sale, pick up only 2slofouru Private 'For Sale' Classifieds 1 08-03-2005 10:16 AM
A/C not working, 95 1.8L Impreza germanturbo Normally Aspirated Powertrain 8 06-27-2005 07:59 PM
FS: 95 1.8L engine Aspen_2.5RS South East Region Forum 11 11-01-2003 08:49 AM
FS: 95 1.8L engine Aspen_2.5RS Private 'For Sale' Classifieds 1 10-30-2003 12:22 AM
2.5 L Engine into a 95 1.8L PumpsGOTAWD Subaru Conversions 4 08-04-2003 08:58 PM


All times are GMT -4. The time now is 12:44 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2014 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.