4g61t.org

I would like to know what the visual differences are,if any. I'm checking to be sure I have '90 4g63t ecu,as the PO said. Only numbers on the case are 9561 on the side,and the numbers from whomever rebuilt it,as it says rebuilt but no company named.


I didn't get a pic of the front cover,put it back in the car(somewhat...pain in the a$$ still isn't all the way in!) but if needed I have any numbers that were written on it,as stated. 2-6142 and 0204IG. I goolged them and found nothing pertaining to ecus. Thanks in advance

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Dale
2003 G35 coupe is mah girl, no more DSM/CSM's :(

The only way to differentiate between them is by the part #'s, they look identical. Judging by the number on the side of the case, I'd guess it's a '90 ECU. All the 1.6 ECU's I've ever seen had 8614 or 8615 on the side of the case.

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91 GSX - 511fwhp and 352 lb/ft 25psi 110 octane, 7.68 @ 95.9mph 1/8th 21psi 91 octane, 11.93 @ 112.9mph, 117.7mph best trap speed, 20psi 91 octane
98 Volvo S70 T5 - DD

http://www.facebook.com/captaintonus

Damn whoever did the rebuild took off the original label and covered it with blue one with the numbers from my original post.

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Dale
2003 G35 coupe is mah girl, no more DSM/CSM's :(

What you have there is an 89 Board dictated by the "890" grouping at the bottom center of the board if you orient the harness connectors directly up.
See the pictures below of what I have in the 1.6L category, and reference the ECU swap listings we have here also.

1.6L (4G61) NA Hyundai 1993


1989 Turbo ECU on the left, 1990 DSM ECU on the right.


MD128612 Mirage Cyborg 1.6T E2T33271 JE331A920C 7Y19 Dual Board Non-Eprom
MD128613 1987-88 12.01/87-11.3/88 JDM C73a E2T33272A Dual Board
MD128615 1989 Colt DOHC FWD TURBO E2T34375 Federal
- E2T34375 8331 EPROM E670 US Colt Turbo 16V
Md128616 Colt C63A E2T33277 Eprom E671 27C256 9FA0 Checksum
MD131842 1989 Mirage C53A DOHC FWD TURBO E2T34376 Federal
- E2T34376A 8Z07 US JE331A942C Mitsubishi Mirage Turbo 16V Federal R129, R130 in place
- E2T34376A 9561 US JE331A942C EPROM E670 Chipset label Turbo 16V Federal R129, R130 in place
- E2T34376 8316 EPROM E670 Chipset label Turbo 16V Federal
- E2T34376 8413 US JE331A979A R129, R130 in place Turbo 16V Federal
- E2T34376 8511 Canadian Dodge Colt Turbo Federal EPROM E670 Chipset label
- E2T34376 8531 Canadian Plymouth Colt Turbo Federal
MD145912 1989-90 09.2/89-09.3/90 JDM C73a E2T35875A Single board
E2T35057 Aussie spec

The rest of the DSM stuff is listed here too: http://www.4g61t.org/forum/viewtopic.php?f=2&t=9992

What are the numbers listed on the harness connector plastic, as seen in the two side-by pics above? If you have any differences from those boards, and it can be added, then it will be an update for the system.

P.S. If anyone reading this ever had their original 1989 Turbo ECU out, let me know if it will add to the numbers in the database. It helps to get all the numbers off the case cover (if original), and to get a clear detailed picture if possible.

Tim my number on the connector is the same as in your pic,4376A. Looks like it is a 1.6 turbo ecu then! Wondered why I had such a strange idle,besides my exhaust cam being off a tooth(thanks PO).

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Dale
2003 G35 coupe is mah girl, no more DSM/CSM's :(

What MAF sensor are you using, and injectors, and is the motor using a 91 set of sensors or 90?

I believe the numbers on my Colt's MAF matched my Eclipse MAF,when I checked last summer. 450 injectors for sure and '90 sensors. Not too sure about the resistor pack,numbers from it are E8T05871. Or,does that need changed?

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Dale
2003 G35 coupe is mah girl, no more DSM/CSM's :(

Injector resistor pack is fine, and if all the sensors including the transistor pack are the proper models, then everything should be in sync the way the OEM designed it.
You definitely know if the wrong sensors were installed and injector equipment because it would throw a code or just not run at all/very well.
Sounds like you have it sorted, so off to find a 4g61t EPROM to drop a stock 4g63t chip into, or a straight 90 turbo ECU w/or w/out EPROM.

Transistor pack is correct also. I believe it is sorted out,I bought the ecu CaptainTonus was selling (4g61t EPROM and stock 4g63t chip he had burnt) and am waiting for it to arrive! Can't wait to fire her up with the right ecu! Thanks Tim and Tonus!

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Dale
2003 G35 coupe is mah girl, no more DSM/CSM's :(

Idles so much better now! Now to get the body done so I can drive it again

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Dale
2003 G35 coupe is mah girl, no more DSM/CSM's :(

Glad some of what I had to say helped. Honestly sometimes I think I am taking a stab in the dark at some things, but as time goes on, my diagnosis isn't too far off in most areas.
Enjoy the car that much more now?

Oh I will when I can drive it. I'm getting an estimate Monday-ish on some damages from a tree limb that shattered my windshield and dented the roof. So,unfortunately it's not drivable But,I'm enjoying driving forwards and reverse in my driveway,for now haha!

As far as your help goes,I've read some of your past posts and you usually are spot-on with your diagnosis. Your help is very much appreciated

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Dale
2003 G35 coupe is mah girl, no more DSM/CSM's :(