ECU question

sd88supra · 10-26-2008, 09:00 PM

I need an ECU for my N/A manual... will the one from a turbo work? I think it has to be manual too, but I don't know if the turbo is different.

f00g00 · 10-28-2008, 12:18 AM

Nope, you will need one from an NA.

shiftysupra · 11-02-2008, 01:09 AM

Yeah that would be due to the fuel ratio is diff... but i read somewhere you could use an automatic turbo ecu in a manual there was just something diff with the wiring... can anyone point me in the right direction in finding out how to do that... like the diagram?

sd88supra · 11-02-2008, 08:01 PM

I think it has to be '86.5-'88 N/A and manual tranny. Am I wrong?

btwilson86 · 11-02-2008, 10:25 PM

I believe that you are correct, 86.5-88 N/A ECU. You can use an automatic ECU to make it work, however you will have to do some creative wiring as the Reverse lights won't work when you put it in Reverse, and the clutch safety switch won't work. I believe there may be other issues, but I'm not positive on that

shiftysupra · 11-05-2008, 07:43 PM

i have an N/A harness and ecu for manual but it's a 92'.... so an 89+ not sure if it would work with an 88 engine...

sd88supra · 11-07-2008, 09:55 PM

I just got an N/A ECU off an '87. However, the letters 7M-GE are red as opposed to yellow like my original ECU. Mine has AE instead of AS like the one I took out. The one I took out is also slightly smaller in size. I've googled 1987 N/A ECU's and they're exactly like the one I just got. Makes me wonder if my ECU was the original to begin with.

Well, lets see what happens.

dieseltech24179 · 11-27-2008, 04:12 PM

hey guys sorry to but in but im having an ecu problem as well
when i bought my supra the guy said that when he bought it it had a wiring harness for an automatic 7mgte and the car is a manual 7mgte he replaced the wiring harness with the right one but idk if the ecu is the same and theres three of them in the car does anyone have the part number of the ecu from a 7mgte manual ecu...i wouldnt know how to tell them apart

Boombastic · 11-28-2008, 06:27 AM

For your ECU's I am pretty sure you only have to stick to either turbo or n/a, whether it is auto or manual wont make a difference the only thing, that was mentioned above, would be wiring your reverse lights in. As for the neutral start switch, if you always have the habit of depressing the clutch to start you wont have a problem leaving that wiring bit out, just bypass or "jump" it. I did an auto to manual swap on an 88 turbo and the only thing I had to do wiring wise was the reverse lights, everything else worked just as before. Good luck to you.

Boombastic · 11-28-2008, 06:30 AM

Quote:

Originally Posted by dieseltech24179

hey guys sorry to but in but im having an ecu problem as well
when i bought my supra the guy said that when he bought it it had a wiring harness for an automatic 7mgte and the car is a manual 7mgte he replaced the wiring harness with the right one but idk if the ecu is the same and theres three of them in the car does anyone have the part number of the ecu from a 7mgte manual ecu...i wouldnt know how to tell them apart

The ecu's aren't the same. The main ecu should be a silver box and should be the biggest one under the passenger side dash, should also have yellow connectors attached to it. The other comps are smaller and I think most of them are black. I would say that the auto ecu would work, but I am not sure since you said that the guy before replaced the harness to a standard harness. So having that done may mean that you need the standard ecu. Cheers.

10-26-2008, 09:00 PM	#1
sd88supra 3" Exhaust Join Date: Oct 2005 Location: San Diego, Ca Posts: 190	ECU question I need an ECU for my N/A manual... will the one from a turbo work? I think it has to be manual too, but I don't know if the turbo is different. __________________ -1987 5 spd N/A with TEMS: low miles! All stock with the exception of electric fans and an '89 front bumper, Yokohama 225/50/16 with stock rims. It's a mess and in the garage. -1987 5 spd Turbo with TEMS: miss-matched tires, needs lots of work, but it runs! Project car. -1988 N/A auto targa: all stock except 18" rims with Falken 265/35/18 in rear and 225/35/18 in front; daily driver.

11-02-2008, 08:01 PM	#4
sd88supra 3" Exhaust Join Date: Oct 2005 Location: San Diego, Ca Posts: 190	I think it has to be '86.5-'88 N/A and manual tranny. Am I wrong? __________________ -1987 5 spd N/A with TEMS: low miles! All stock with the exception of electric fans and an '89 front bumper, Yokohama 225/50/16 with stock rims. It's a mess and in the garage. -1987 5 spd Turbo with TEMS: miss-matched tires, needs lots of work, but it runs! Project car. -1988 N/A auto targa: all stock except 18" rims with Falken 265/35/18 in rear and 225/35/18 in front; daily driver.

11-02-2008, 10:25 PM	#5
btwilson86 Super Moderator Join Date: May 2007 Location: Billings, Montana Posts: 1,034	I believe that you are correct, 86.5-88 N/A ECU. You can use an automatic ECU to make it work, however you will have to do some creative wiring as the Reverse lights won't work when you put it in Reverse, and the clutch safety switch won't work. I believe there may be other issues, but I'm not positive on that __________________ 1989 7MGTE R154 Targa Top White Package w/Blue Interior Driftmotion 57trim CT26, Upgraded Intercooler, 2.25" Hard Pipes, 3" Turbo Back Exhaust with Test Pipe, HKS VPC w/GM 3 bar MAP sensor, APEXi S-AFC, Walbro 255lph fuel pump, ProSport EVO Series Boost / Fuel Pressure / AFR gauges, Lotek a Pillar Gauge Pod, HKS Type 0 Turbo Timer, Eibach Lowering Springs, Tokico Illumina II TEMS struts, custom powder coated Motegi Racing TrakLite wheels

11-07-2008, 09:55 PM	#7
sd88supra 3" Exhaust Join Date: Oct 2005 Location: San Diego, Ca Posts: 190	Update I just got an N/A ECU off an '87. However, the letters 7M-GE are red as opposed to yellow like my original ECU. Mine has AE instead of AS like the one I took out. The one I took out is also slightly smaller in size. I've googled 1987 N/A ECU's and they're exactly like the one I just got. Makes me wonder if my ECU was the original to begin with. Well, lets see what happens. __________________ -1987 5 spd N/A with TEMS: low miles! All stock with the exception of electric fans and an '89 front bumper, Yokohama 225/50/16 with stock rims. It's a mess and in the garage. -1987 5 spd Turbo with TEMS: miss-matched tires, needs lots of work, but it runs! Project car. -1988 N/A auto targa: all stock except 18" rims with Falken 265/35/18 in rear and 225/35/18 in front; daily driver.

11-27-2008, 04:12 PM	#8
dieseltech24179 3" Exhaust Join Date: Oct 2008 Location: vinton Posts: 57	ecu hey guys sorry to but in but im having an ecu problem as well when i bought my supra the guy said that when he bought it it had a wiring harness for an automatic 7mgte and the car is a manual 7mgte he replaced the wiring harness with the right one but idk if the ecu is the same and theres three of them in the car does anyone have the part number of the ecu from a 7mgte manual ecu...i wouldnt know how to tell them apart

10-28-2008, 12:18 AM	#2
f00g00 12psi boost Join Date: Aug 2005 Location: Kuwait Posts: 292	Nope, you will need one from an NA.

11-02-2008, 01:09 AM	#3
shiftysupra 3" Exhaust Join Date: Jan 2006 Location: Arizona Posts: 96	Yeah that would be due to the fuel ratio is diff... but i read somewhere you could use an automatic turbo ecu in a manual there was just something diff with the wiring... can anyone point me in the right direction in finding out how to do that... like the diagram?

11-05-2008, 07:43 PM	#6
shiftysupra 3" Exhaust Join Date: Jan 2006 Location: Arizona Posts: 96	i have an N/A harness and ecu for manual but it's a 92'.... so an 89+ not sure if it would work with an 88 engine...

11-28-2008, 06:27 AM	#9
Boombastic 3" Exhaust Join Date: Jul 2007 Location: Maple Ridge, B.C. Posts: 96	For your ECU's I am pretty sure you only have to stick to either turbo or n/a, whether it is auto or manual wont make a difference the only thing, that was mentioned above, would be wiring your reverse lights in. As for the neutral start switch, if you always have the habit of depressing the clutch to start you wont have a problem leaving that wiring bit out, just bypass or "jump" it. I did an auto to manual swap on an 88 turbo and the only thing I had to do wiring wise was the reverse lights, everything else worked just as before. Good luck to you.

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