2G What year ECU

[sunghost]

Can anybody tell me the year of my ecu? MD312464. I'm trying to wire a potentiometer to stop the Manifold Differential Pressure sensor malfunction code P1400 due to the 6 bolt swap on my 95 GSX. I was told that it was an orange wire with a white stripe pin 85 but there is not one on there. At a friends house at the moment so any help would be great.

Sun

 

[blkwidow]

2G TEL Turbo FWD (D32A)
Federal MT
(MNGFL4M) California MT
(MNGFL9M) Federal AT
(MRGFL4M) California AT
(MRGFL9M)
1/94-7/94 - MD312464
E2T61672 1/94-7/94 - MD312464
E2T61672 1/94-7/94 - MD312464
E2T61672 1/94-7/94 - MD312464
E2T61672
7/94-6/95 - MD309947
E2T61674
7/94-6/95 - MD309947
E2T61674 7/94-6/95 - MD309947
E2T61674 7/94-6/95 - MD309947
E2T61674
7/95-6/96 - MD321912
E2T61677
7/95-6/96 - MD321912
E2T61677
7/95-6/96 - MD321912
E2T61677
7/95-6/96 - MD321912
E2T61677

7/96-6/97 - MD335287
7/96-6/97 - MD335287 7/96-6/97 - MD335287 7/96-6/97 - MD335287
7/97-5/98 - MD346675
7/97-5/98 - MD346675 7/97-5/98 - MD346675 7/97-5/98 - MD346675
6/98-4/99 - MD359402
6/98-4/99 - MD359402 6/98-4/99 - MD359402 6/98-4/99 - MD359402

I found this here.

Eclipse Talon Laser Galant 3000GT Stealth ECU ID Reference

It says your ecu build date is from Jan of 94 to July of 94.

Hope this helps.

 

[sunghost]

Now that you've identified the ECU, which really helps, I have to figure out why the code is still being thrown if the MDP sensor didn;t exist on the 94 eclipses. Thaks for the help. Any body now why the code is till being thrown to the ecu? I'm now. 95 GSX with a 6 bolt swap getting P1400 code on the 94 ECU? Also I'm not sure if the last owner changed the wiring harness or not.


Sun

 

[blkwidow]

Thats the build date but im pretty sure it's still a 2g ECU because a 1g wouldn't fit. Did you connect your MDP to a vacumm line? You can do this by T-ing into the brake booster line located at the back of the manifold, or really just any reliable source.

 

[sunghost]

But where would the sensor wire go there still isn't a place for it?

 

[blkwidow]

I got this from magnus motorsports. See step One. This info can be found here.

http://www.magnusmotorsports.com/tech/1gina2g.pdf

Many people using the 1G CAS on a 2G head have been running into problems with misfire engine codes
while at cruise. Many different things have been blamed for this and many different fixes have been attempted.
This fix will keep the ECU from looking for misfires at all. This is the criterion that must be met before the
ECU will start to look for misfires:
· 300+ seconds of steady state RPM less than 80% throttle position
· Engine coolant temperature -10C or higher
· Intake air temperature -10C or higher
· Barometric pressure greater than 76 kPa
Now if we can get one of these values outside of the criteria the ECU won't check for misfires. The value that
would be the easiest to change would be the barometric pressure sensor. We're going to add resistance to
this value so that the ECU will see less barometric pressure than what there really is. This will also lean the
car out so you should see a performance increase as well. Depending on the car and altitude you might need
to add more fuel with an AFC.
So let's get started, Parts needed:
· A 10K potentiometer (although a 5K would probably do just fine). These are available at any
electronics store, if you go to Radio Shack ask for a volume control knob because they don't know
what a potentiometer is.
· Wire strippers
· Soldering iron
Step 1: Remove the access panel on the driver's side of the center console. You should now see four plugs
with a ton of wires going to them.
Step 2: Pull out the top plug, it'll be the one that's the hardest to reach. Locate wire #85. It's orange with a
white stripe.
Step 3: Cut the orange wire in half. Solder one end of the wire to the center peg of your potentiometer.
Solder the other end to either the left or right leg, it doesn't matter which. Turn your potentiometer all the
way counter-clockwise.
Step 4: Plug the harness back in and start up the car. It should sound like it did before you did any
modifications. If the idle is choppy or the car won't run you turned your potentiometer the wrong way.
Step 5: Add resistance to the barometric pressure sensor by slowly turning the knob on the potentiometer.
Drive the car around; if you get a CEL then add some more resistance. Keep doing this until you no longer get
the CELs.

 

[sunghost]

The only issue is that we didnt find an orange wire with a white stripe. I'm leary about messin with the wrong wire. Is finding wire 85 an option? I'm not sure if the guy put in a different wiring harness with the JDM engine, would the wires be different colors or the same?

 

[sunghost]

Does anyone have a non risky solution?

 

[snowborder714]

See if this'll help you find pin 85:
http://www.dsmlink.com/images/forums/2GECUPinout.pdf

 

[turbosax2]

The wire on pin 85 on a 2g ecu is orange - there is no white stripe on the wire.

 

[2bros]

just buy a performance chip from dsmchips.com and be done with it.... they program it to your car for the upgrades u got check it out thats what im going to do with my 95 gst 6- bolt swap

 

[2bros]

i just bought the dsm link and chiped ecu for my 6-bolt swaped 95 eclipse from dsmchips.com they preprogramed it for me and it fixed my p1400 code right off, i just havent hooked up the link to it yet for tuneing, id say was not a bad investment!