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-   -   Evo8 ECU in a 1G DSM in the works! (https://www.evolutionm.net/forums/ecuflash/436196-evo8-ecu-1g-dsm-works.html)

Jack_of_Trades Jul 26, 2009 11:00 AM

Evo8 ECU in a 1G DSM in the works!
So I am trying to get an EVO8 ECU I have to work in my 1G DSM and so far I got it to start and idle like a champ running the 96530006 rom with the immobilizer disabled. The only issue I am having at this point is the timing advance. In Evoscan, its locked at 5* constantly. The 2G DSM guys have been doing this swap for about 6 months now and I know the 1G's have slight differences but I still cant figure out what would make the ECU keep timing locked at 5*! Any ideas,suggestions would help greatly.

0xDEAD Jul 26, 2009 11:05 AM

Is the ecu in limp mode of any sort? What if any codes is it throwing. All I can tell you is that my evo in a 1g setup works fine and timing indeed changes.

Jack_of_Trades Jul 26, 2009 11:08 AM

You have an Evo8 ECU in a 1G!?!? You would be the first I could find that already did it. Its throwing the code for the crank sensor of course but thats the only one pertaining to actual driveability. This is a 1990 1G BTW. Not sure what the ECU would do for timing in limp mode...or how to tell that the ecu is infact in limp mode.

With the crank sensor signal removed from the ECU, evoscan registers 61* of timing, with it plugged in it continuously reads 5*

DSMorBUST Jul 26, 2009 11:10 AM

do want evo ecu in my 1g dsm too. do friggin want! lol

0xDEAD Jul 26, 2009 11:16 AM

Mine is a 1990 as well. I did it over the winter been to pussy to plug it in till a couple weeks ago. Anyways I am looking at logs from the day I started it up and drove it around. I am getting the full timing swing. Timing is "hunting" around idle which is exactly what you see on an evo. The ecu adjust timing to steady out the idle. I also got it up to 38 deg at one point in the log. I am running on a 2003 USDM rom and throw both CAS codes and it still works fine. I'll be throwing in the EDM rom to take care of the CAS codes next time I work on the car. So the USDM evo 8 rom should work fine for you. What CAS are you running and exactly what CAS codes are you throwing? A bad CAS or bad CAS signal is the only thing I can think of that would freak the ecu out that badly. Also is your MAF spitting out a Hz signal? Mitsubishi ecu's don't like it so much when you don't have a MAF signal, however they will still up and start (mine did for example).

Jack_of_Trades Jul 26, 2009 11:23 AM

Do you have any info on the pinout conversion you did to cross reference mine since no one has fully documented this for the 1G's yet???? The engine that was swapped in my mirage was from a '90 eclipse so i assume the CAS is the stock one from the 1990 model year. I just logged crank signal with evoscan and got '0' which I assume means its not seeing crank signal. I used pin 22 from the 1G harness for crank signal (solid black wire). The code was P0335 DTC P0335: "Crankshaft Position Sensor Circuit "

0xDEAD Jul 26, 2009 11:35 AM

I don't have a scanner big enough to scan my schematics and I don't have a camera with me.

Did you use 1990 model year specific pinouts on the DSM side? The wiring changed from 1990---->1991, be aware of that. Pins 6 and 14 are switched from 1990-1991. That is the idle switch and airflow signal pins respectively. That could be your problem there.

The car won't run without both CAS signals so it is probably wired in correctly. I have Crank angle from DSM pin 21 going to evo pin 89 and TDC from DSM pin 22 going to evo pin 88.

I really need to know if you have a 1990 or 91 up engine wiring harness.

Jack_of_Trades Jul 26, 2009 11:38 AM

its a 1990 as I stated, and I was aware of the 2 different pins for the 1990 from the DSMlink pinout chart I used. I am reading airflow with evoscan just fine too.

0xDEAD Jul 26, 2009 11:56 AM

Well that is the major stuff. Are you sure your logging equipment isn't flaking out on you?

Jack_of_Trades Jul 26, 2009 11:58 AM

Use it every day of my life for the past 2 years, its working JUST fine. I'm gonna make a layout of the ECO swapped pin locations and if you wouldnt mind filling in any blanks, I would greatly appreciate it.

0xDEAD Jul 26, 2009 12:06 PM

I can take a picture of my schematics and email them to you this weekend if you can wait that long. Else I just remembered, the ecu holds 5 deg when the engine is not running but the ecu is booted up. Are you able to read/write from the ecu?

0xDEAD Jul 26, 2009 12:11 PM

Also, I did not swap pins, I made a conversion harness as this video shows:

I'm not sure if it matters. Also, if you haven't done so already you need to put in an evo 8 knock sensor. The 1g will not work for you, different sensitivity level meant for a different style of knock detection.

Jack_of_Trades Jul 26, 2009 12:12 PM

1 Attachment(s)
I can read/write to the ECU no problem, same with datalogging. I already know about the knock sensor issue. The car has the A/C removed already. Here is what I have connected so far:


Here is a link to the 1G DSM pinouts:



evonut270 Jul 26, 2009 12:28 PM

you probably know already but you can adjust the knock sensor sensitivity to suit.have you tried using the disable code for the knock sensor to see if it sorts the timing issue?

0xDEAD Jul 26, 2009 12:34 PM

- I do not have any of the ISC wires hooked up
- I do not have EGR or evap purge solenoids hooked up
- I have pin 11 on evo going to pin 105 on dsm (BCS solenoid)
- evo pins 13 I have going to dsm 106, and evo pin 26 going to dsm 101 (they are all chassis grounds)
- pin 33 does not get hooked up as a 1g alternator does not need ecu control (yours is fine)
- pin 37 I do not have hooked up as I have a manual rack
- pin 40 I have going to 17 ("clean" signal grounds)
- evo pin 41 does not need hooked up on a dsm
- I did not hook up pin 86 (VSS) as the 1G dsm is different from the 2g/evo uses a true VSS. The signal is incompatible and should not be hooked up. The VSS is in the speedo on a 1990. The VSS is mounted on the transmissoin (where the speedo cable goes into a 1g DSM).
-pin 92 evo I have going to pin 17 dsm ("dirty" grounds)

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