7M-GTE w/ 7M-GE ECU?

[MA70witBoost]

Ok... Ive been hearing from a few people that the 7M-GTE can't run off of a 7M-GE ECU... This is odd because my Supra was running for two weeks when I got it. :icon_conf Its being gay now and wont start but thats besides the point. :nono: Supposedly the NA computer isn't compatible because the NA Supra has a Distributor and the Turbo Supra has a Cam Position Sensor. Sounds reasonable but the damn car was running! :icon_mad: Ive heard things as far as fuel maps and the sensors issues so im trying to see if i can find a Turbo ECU to throw on mine. I've also heard that the ECU from different years dont match up with all wiring harnesses. I might be getting a newer computer (ie. not from a 87) so i might have to get a new harness to match with the year of the harness (im getting a new harness anyways so no big). I just want to know if theres any validity to this information. :1zhelp:

 

[MKIIINA]

http://www.supra.co.nz/87tsrm/EFI/efi2.htm na ecu
http://www.supra.co.nz/87tsrm/EFI/efi5.htm turbo ecu

i dont know how thats running....

 

[Nick M]

Both cars run a cam position sensor. It is needed for both. The CPS is a part of the distributor on the 7MGE.

You can not run a GE computer on a GTE. The ECU will not fire the sparkplugs right. The GTE uses a coil pack with three triggers, the GE with a distributor uses just one.

The 7MGE also switched to high impedance injectors after 89 I think.

 

[cruzinbill]

MA70witBoost just post a pic of your ecu then we will know for sure if it can or not cus I also doubt its possible but hell if the guy only has a na one and it was running then it may be possible lol

 

[shaeff]

i'm willing to bet it's just confusion. the GTE ECU says 7MGT on it, which could be easily confused with 7MGE

-shaeff

 

[MKIIINA]

iunno guys i was talking to him last night and he said the ecu had "7mge" on it {shrug}

 

[shaeff]

weird... just weird...

-shaeff

 

[MA70witBoost]

What joy... so now I gotta disasemble the glove box to prove I got a GE computer. :icon_neut Wait till tommorrow guys... You'll see. It had caught me by surprise too. I was like :wtf:!? I didn't think it was supposed to say GE. I know the difference between a GE and a GTE... even if it was to say GT id still know it was a turbo computer. Im just waiting... As much as it sucks to have to wait :ugh:, imma be patient, throw the new harness on it so i wont have anymore engine bay electrical problems, imma throw on a turbo ECU, an KOYO radiator with a thermostat (didn't have one befor) and a new fan clutch. This car will be running perfect :biggrinbo . I still dont know how the hell it was running at all with a non turbo computer but im not complaining about it running with it... im complaining about it not running right now :madfawk: . Oh well, that doesn't solve any problems :3d_frown: . I'll post the pictures of the GE ECU tommorrow.

 

[Jeff Lange]

Post the part number and/or pictures, and I can confirm what it is.

A 7M-GE ECU can't control the 7M-GTE's ignitor for DLI, has a different tach signal, different CPS, different air flow meter (that one is HUGE difference).

The N/A AFM literally outputs the 200% opposite of what the Turbo AFM does. There's a different number of wires, different wires do different things, etc.

The 7M-GTE has an extra knock sensor, and a 3-wire O2 sensor instead of a 1-wire O2 sensor.

The injectors are a different size and impedence (impedence for 89+ only).

Finally, after all that, the connectors are different, they have a different number of pins, etc, and they are not shaped the same, the Turbo harness won't plug into an N/A ECU. Turbo connectors have 26, 16, and 22 pins on the 3 connectors, N/A connectors have 10, 18, and 24 pins on the 3 connectors.

 

[chriso]

Don't mess with Jeff:biglaugh:

 

[shaeff]

maybe his car is an na-->T and he's still on a distributor + N/A electronics...

post pics of your engine bay, too!

-shaeff

 

[7mgte3sgte]

ok i spoke to christian about this subject he says its possible to run a n/a computer on a turbo but its a killer thing to do because it runs the engine way to lean but it can work plus if my boy here says its a 7mge then it is he doesnt get confused often about stuff i talk to him on a daily basis so now what we need to do is find a 7mGTE computer that will fix his car

 

[shaeff]

i dont believe it until i see proof... i'm not questioning anyones credibility, but read jeff's post...

-shaeff

 

[bigaaron]

What joy... so now I gotta disasemble the glove box to prove I got a GE computer. :icon_neut Wait till tommorrow guys... You'll see. It had caught me by surprise too. I was like :wtf:!? I didn't think it was supposed to say GE. I know the difference between a GE and a GTE... even if it was to say GT id still know it was a turbo computer. Im just waiting... As much as it sucks to have to wait :ugh:, imma be patient, throw the new harness on it so i wont have anymore engine bay electrical problems, imma throw on a turbo ECU, an KOYO radiator with a thermostat (didn't have one befor) and a new fan clutch. This car will be running perfect :biggrinbo . I still dont know how the hell it was running at all with a non turbo computer but im not complaining about it running with it... im complaining about it not running right now :madfawk: . Oh well, that doesn't solve any problems :3d_frown: . I'll post the pictures of the GE ECU tommorrow.

The ecu cover is removable, it got switched. As stated before, the car would not run with a 7mge ecu. And it does not run now so something is obviously wrong!

 

[jetjock]

I've stayed out of this because the answer should be obvious to anyone even remotely familar with the EFI system on either engine. For the record there is no way a N/A ECU will run a 7MGTE. Jeff's post is only the beginning but the DIS and AFM issues alone make it impossible. No doubt there is a logical explanation but it isn't a N/A ECU running a GTE.

 

[bigaaron]

And even if it did defy the laws of physics and somewho magically worked, why the hell would you want that on your car???

 

[MA70witBoost]

Ok... My mistake... Shaeff, your right man. I dissassembled the glove box to take the picture for you guys and it says GT as opposed to GE. My mistake, Sorry guys. :nono: I promised pictures of the ECU so here they are... Im also throwing in some engine bay shots and a whole bunch of pictures of the car. Some might be big but not all... My sister keeps resetting the digital camera to 1024 by 768 pixles :icon_mad: . Some are shot in 640 by 400 so it shouldn't be too bad.

These are pictures of how the engine bay was when I first bought the Supra back:

This is The Supra: :biggrinki

The long awaited GTE ECU (my mistake!) :kaboom:

Oh, This is the engine bay now in its current state:

Opinions on the Supra are welcome. Right now its just sitting in my driveway. Its waiting for its new parts. Motor's electrical was a mess befor, I know. My boy put $7000 into the motor to get it running good (ie. MHG, Upgraded CT-26, BOV, Upper Intercooler Hard Pipe, etc.) But neglected the rest of the car. Its my duty now to finish it off. Oh well.

 

[jetjock]

Stuff happens. Jeff's post is valid other than the O2 sensor isn't a showstopper and the high impedance injectors would only require removal of the resistor pack but there are many other issues that'd prevent it. One might argue the engine could possibly run in limp mode with a "bad" AFM but, as noted, the GTE's DIS can't possibly be run off a N/A ecu. The signals don't exist for it. Not to mention the firmware is completely different.

 

[MA70witBoost]

Im not all too familiar with the supra. Yeah, this was my first car, but it had only lasted me a week. Thats how bad it was when I got it. My dad only payed $300 (not a typo) for it. I just wanted a second chance with it so im trying to fix it up. Hopefully I dont fuck it up again. :icon_sad: