Is there any way to determine that the ECU is going bad prior to it dying completely? Car's been shutting off randomly while driving - pretty much just like how it was a couple weeks/months prior to last ECU dying. Replaced in 2004 with a used one off a member on here.

I guess it wouldn't hurt to just buy a spare ECU so I don't get stranded anywhere, but it'd be nice if there was a way to diagnose a dying ECU.

-marc

Is it completely shutting the car down, or just for a fraction of a second while driving? If its idleing and it happens it will probably stall. I was having the same problem, never actually figured out what was wrong, just went to MS.

95 Eclipse GS: 10.5:1, Crower 2's and MSII
186 WHP - 150 WTQ
14.697 @ 93.85 MPH......Gone, but not forgotten
99 420A Avenger: Given to my sister
99 GS OZ: Sold
03 Evo 8: Family Car with balls

______________________________
If a sentence found online has 35% misspellings or greater and includes at least two racially charged expletives, chances are it is a YouTube comment.

'95 Eclipse TurboGS (garage deco)
'95 TSi AWD (restoring a survivor)
'97 Talon ESi-T (poor impulse control)
'99 Eclipse RS-T (daily beater)
'13 Evo X (mostly stock)
'17 Sienna (Middle Aged Dad Mobile)



Factory Service Manuals: http://nawdu.de/files/

when it just resets while driving, the CEL disappears for a couple minutes (mine is normally always on b/c they didn't reflash when they did the secondary air recall thingy). sometimes it completely shuts down while driving too tho. pretty much the same things it was doing when the last ecu died. blah.

-marc

Thats weird, I usually had better luck with one that wasnt reflashed compared to one they did.

Heres the real irony. The only ECU I ever had to never show any signs of failing on me, was for an auto car. I could only rev to 6400 before it would rev limit, but it never failed.

95 Eclipse GS: 10.5:1, Crower 2's and MSII
186 WHP - 150 WTQ
14.697 @ 93.85 MPH......Gone, but not forgotten
99 420A Avenger: Given to my sister
99 GS OZ: Sold
03 Evo 8: Family Car with balls

-marc

I do remember seeing rebuilt ECU's available recently. IIRC they were $150+core

Erik P.
Official 2GNT thread Hijacker
Some say that he's driven over more Covenant than he's shot, and that his grenades aren't where you'd expect them to be...
All we know is, He's not The Stig... But he is The Stig's Spartan cousin!

That's how my last 95 MT ECU died. It would stop providing the 9V power for the crank and cam sensor. You could use an adjustable voltage regulator to provide this power to the sensors. I did this and use weather-pack connectors to choose between the ECU or my circuit providing the sensor power.

Corbin
'95 ESI-T

Now with more power and fewer leaks



Humble servant of the Wiki

Erik P.
Official 2GNT thread Hijacker
Some say that he's driven over more Covenant than he's shot, and that his grenades aren't where you'd expect them to be...
All we know is, He's not The Stig... But he is The Stig's Spartan cousin!

question:

i've been trying to find a used mtx 95 ecu and one of the sellers offered me one that is 95-96 compatible. i thought none of the ecu's are interchangeable? he said late 95 and 96's are the the same. is this correct? i'm pretty sure mine is an early 95 anyways, but just wanted to verify if i need to specify early vs late 95 mtx when looking for an ecu... thanks

-marc

96 ecu's have the two harness plugs and won't work on a 95. You need to find out if the ECU has one harness plug or two

Erik P.
Official 2GNT thread Hijacker
Some say that he's driven over more Covenant than he's shot, and that his grenades aren't where you'd expect them to be...
All we know is, He's not The Stig... But he is The Stig's Spartan cousin!

-marc

IIRC it was a model year change.

Erik P.
Official 2GNT thread Hijacker
Some say that he's driven over more Covenant than he's shot, and that his grenades aren't where you'd expect them to be...
All we know is, He's not The Stig... But he is The Stig's Spartan cousin!

-marc

K he said it's a single plug, so I should be good?

This is the PNC he gave:
#05269730

But i'm not sure how to use it to verify it'll work for me..

-marc

-marc

Just to add some more data points to this thread. I have had two more '95 ECUs lose their front O2 input. I found this out when I swapped control back to the stock ECU to pass emissions. The ECU would pull the output of the front O2 sensor down to 0.135-0.155V. The ECU interprets this as a lean condition and will add fuel using the short term and long term fuel trim. The car won't run so well 50% rich. The ECU I was using and the used replacement both suffered from the same failure mode. I first looked at what the ECU thought the O2 output was by using a datalogger (0.135-0.155V). I then stripped the insulation from the O2 sensor output wire and put a voltmeter on it (0.135-0.155V). I then cut the O2 sensor output wire. Put a voltmeter on the sensor side and I get a cycling output from 0V to 1V. Yay. Put a voltmeter on the ECU side and I get 0.135V. Just to make sure it was the ECU, I unplugged the ECU connector and checked the resistance from the O2 sensor output pin at the sensor connector to the matching pin on the ECU connection. It was significantly less than 1 ohm, so I called that good. I put in a Chrysler remanufactured ECU and everything works fine.

Corbin
'95 ESI-T

Now with more power and fewer leaks



Humble servant of the Wiki

My 95 ecu was doing the same thing. Just randomly it would shut off while idling, or start to sputter whenever the hell it felt like it. eventually it got to the point where it didn't even start. Luckily it happened at the shop where I work. I found that the asd relay and the fuel pump relays were not closing and i replaced them less than a year ago. I checked both relays and they work. The ecu was not sending the ground to close the relays. I jumped the relays to see if it would start but it wasn't pulsing the ground to the coil. The ground control citcuit inside crapped out. Got a refurbished one for $200 plus the old core with a year warranty. Plugged it in and it started up like a champ. Also it was not setting any codes to help me diagnose it.

----------------------------------------

Sorry about bringing up an old thread, but I just remembered that Malachi was having some of the same issues that are mentioned here right before the accident. Basically the engine stuttering around 2500-3500 rpms and occasionally the random "shutdown" while driving where the engine will buck for a split second, and the CEL will kick off for a moment. No codes for a misfire or anything other than my missing EGR.

I'm expecting to need to buy a new ECU, but I have some concerns over buying an original used one of course. Has anyone used the remanufactured ECUs with decent luck? I've seen used Mopar remans floating around between $100 and $200 and aftermarket remans floating around for $200-300.

Any suggestions?

Edit: This is the one I'm looking at pretty seriously
CARDONE 79-3319
I have checked the part numbers for my production date so it should be correct.

Erik P.
Official 2GNT thread Hijacker
Some say that he's driven over more Covenant than he's shot, and that his grenades aren't where you'd expect them to be...
All we know is, He's not The Stig... But he is The Stig's Spartan cousin!

I have a reman cardone ecu that I originally picked up at AutoZone probably 4-5 years ago. Still works. Currently piggy-backed with MS.

_____________________________________________
95TalonOwner on DSMTuners.com
Wes Tank on WiDSM.org

Cool. Took me a few tries to find a place that had one, but I got one on order. Should be here before I get the car back from the body shop.

Erik P.
Official 2GNT thread Hijacker
Some say that he's driven over more Covenant than he's shot, and that his grenades aren't where you'd expect them to be...
All we know is, He's not The Stig... But he is The Stig's Spartan cousin!

FUCK!

The place I ordered it from just emailed me saying there was an issue and they couldn't get another one.

At least they refunded my money right away.

EDIT: Has anyone dealt with this company?

Erik P.
Official 2GNT thread Hijacker
Some say that he's driven over more Covenant than he's shot, and that his grenades aren't where you'd expect them to be...
All we know is, He's not The Stig... But he is The Stig's Spartan cousin!

Triple post!

That company I linked in the last post has a TON of negative feedback once you do a little searching online. I did some research, and the Mitsu factory reman ECU isn't that expensive, and it's still available. My cost through a friend at the local dealer is only $230.

Erik P.
Official 2GNT thread Hijacker
Some say that he's driven over more Covenant than he's shot, and that his grenades aren't where you'd expect them to be...
All we know is, He's not The Stig... But he is The Stig's Spartan cousin!

-marc

Erik P.
Official 2GNT thread Hijacker
Some say that he's driven over more Covenant than he's shot, and that his grenades aren't where you'd expect them to be...
All we know is, He's not The Stig... But he is The Stig's Spartan cousin!

I'm still sitting on a spare 95 ECU because I bought a reman from an electronics place on ebay two years ago thinking that was my problem. Turned out to be my crank angle sensor...again.

The screen name says it all