Evo 8 ECU In 2g Works!!

[mike96]

I'm sorry for being a little bit thick here but can anyone send me a rom from a running car with no CELs? I'm going to be going out and installing my ecu today and I would like to minimize the potential areas for error so that I can make sure that my wiring and install are correct before I start playing with the software.

I have downloaded the tephra modded 96530006 and 90550001 and I have evo8 injectors that I plan on putting in right away but I haven't really gotten to the point that I'm fully understanding what is going on here. If I install either of the tephra modded roms should the immobilizer already be disabled or will I have to do something with that? I know I'll have to change the maf scaling but the car should be able to turn on even if I don't just to make sure that I have a running car afterward right?

Sorry for the numbskull questions but I like to gather as much information as possible all at once before actually getting my hands dirty. I've found that that saves a lot of headaches over time.

Also, has anyone been using a wideband with this? I plan on installing mine temporarily in the rear o2 bung so does the evo8 ecu get pissy if that input isn't there? Also what should I connect the analog out to if I want to log it? I searched all the evoscan and evo ecu threads on these forums and couldn't find any answers.

for my install i went to the junkyard and snagged an extra connector from another car for the pins that gave me a few extras for when i need them. if i remember correctly the immobilizer is not turned off on the tephra mod roms so you will have to check that. yes your car should run with the maf out of scale but it will run rich, i think.

this next part is going to sound like a lot right now so save it for a little later and once you have your car running and have messed with ecuflash and evoscan a bit it really isn't that bad.

as far as the wide band goes there are a couple of things you need to know for that. do a search and look on evolutionm.net to make sure i am giving you correct info, because the roms are all a little different, but. if you are using the 9653 rom you will need to turn on tephra's mod option for the rear o2 simulator. this makes the ecu think that there is still an o2 sensor input still coming in. you will also have to simulate the rear o2 heater, unfortunately there isn't a software fix for this yet, you need to do this with resistors, which i cant seem to get to work. then you can take the 0-5v output from your wide-band and wire it into the rear o2 sensor input, to make this work correctly you will need to make a change to the MUT table. alright i will need to dig a little to get the correct info for that part. then the last thing you will need to do is add the info to evoscan to log the new input. if you do a search on evolutionm.net for "how to log lc-1 without a serial cable" you can get the correct line to add to evoscan and the change to make to the MUT table.

hope i didn't overload you to much.

also there is one other thing i would like to add. if you plan on using the 9055 rom just letting you know the wireing is just a little different you dont need to swap pins 8 and 22. acording to the ecu pinout i have those two pins on the evo7 are the same as the 2g eclipse.

 

[the_mork]

That is interesting as far as the pinouts go.

I spent about six hours reading last night about ecuflash and tephra mods and I'm fairly confident that I've learned enough to have a fairly good idea of what is going on and have built a rom that I believe should allow me to at least start the car. Is a MUT file the same as a metadata (.xml for ecuflash) file?


Because I had so much of an issue with this I think when I get my car running I will write a quick and dirty guide along with a rom that others can use just to get their car idling.

Right now the Rom I'm using is the 94170015 because Tephra has not created a patch for the rom that was already on my ecu 94170014. I'm sure I'll run into some CELs but I think it should be enough to get the car going. The reason that I'm not using either of the more popular roms from this thread is that I ran into some parsing errors but I will go back today now that I am far more informed about the text that I was blindly copying and pasting and see if I can't clean some of that stuff up and make things work for me.

 

[mike96]

you will fine the MUT table in ecuflash for your rom, if you are using a rom that has a tephra mod done you should already see it when you open the rom under misc. if you cannot find the mut table in ecu flash you can get it here Official 2 byte thread! - evolutionm.net .

94170015 is an upgrade rom to all of the 9417 based roms so it should install fine, however.... right now there is no way known yet to get rid of the CEL for cam and crank sensor malfunction and i would be willing to bet that you would still get the CEL for the idle and generator FR circuit. while the car will run it is very annoying. i recommend the 9055 or 9653 rom instead especially if you are interested in the tephra mods the 9926 rom isn't supported.

 

[the_mork]

I'm not actually all that interested in the tephra mods I was just playing with editing things. I would like to keep the CEL on knock but I have an automatic so NLTS isn't very useful and neither is valet mode. I know that there are some other niceties in the tephra mods but I haven't explored them fully yet.

I'll look at the MUT table and I'm sure I will be changing to a different rom but I'll get to that once I'm in the garage and over my hangover.

 

[jjgrizz73]

9927 rom I had troubles with inversed load/injector pulses with both the maft and stock 2g maf. I switched back to the 94170015 with most of the bits disabled. I am still throwing codes for a few things but the car is running smoothly(cam/crank sensors, etc). Airflow hertz at 37.5, o2 feedback at 5.199, and increasing load/pulses. Im not too worried about a cel light if the car is tunable and runs great.

 

[mike96]

a little update for CEL

well i think i have figured out why the evo ecu will throw a code for the alternator FR circuit and maybe the idle as well. as i said before i think that you will get the idle CEL the same time as the alternator because the evo ecu bases idle rpm off of battery voltage. so i did a log his morning and here are my findings. as stated before i found that the ecu will give a CEL for alternator FR circuit if output voltage is same as or less than battery voltage for 20 seconds. so i went out to the car turned on the ignition and started evoscan. battery voltage was just a little over 12v, turned the starter over and voltage dropped to just over 10v while the car cranked then went up to close to 11.5v after the engine started and was running. battery voltage stayed about 11.5v until i gave the car a little gas and brought the rpm up to a little over a grand, after the rpm dropped back to 800rpm idle voltage stayed close to 13.5v. apparently the alternator may need a little kick start to get it going in the morning.

i am going to do a little more testing just to see if i am correct in my assumptions but i think for now if you just give the throttle a little blip to get the alternator a kick in you should be able to avoid the alternator FR circuit CEL and possibly the idle CEL as well.

 

[mike96]

I'm not actually all that interested in the tephra mods I was just playing with editing things. I would like to keep the CEL on knock but I have an automatic so NLTS isn't very useful and neither is valet mode. I know that there are some other niceties in the tephra mods but I haven't explored them fully yet.

I'll look at the MUT table and I'm sure I will be changing to a different rom but I'll get to that once I'm in the garage and over my hangover.

the nice thing about tephra's valet mode is that you can set it to something really low like 114rpm which is where i have mine at and set to auto valet on fresh ignition. that way if you don't know what to do when you get in the car it wont run...... kind of an anti theft.

 

[the_mork]

I've been messing with the 9653 rom and I was curious if anyone else ran into issues with the MAF scaling. There is a value for MAF size but unlike the other roms that I've played with there simply is no table for MAF scaling. What is everyone else doing about this?

Also can I safely assume that the roms coming with the tephra mods have stock fuel and timing maps?

I know I'm asking a lot of somewhat silly questions but I figure that if I have the question other people probably do too.

 

[clockworktoy]

I've been messing with the 9653 rom and I was curious if anyone else ran into issues with the MAF scaling. There is a value for MAF size but unlike the other roms that I've played with there simply is no table for MAF scaling. What is everyone else doing about this?

Also can I safely assume that the roms coming with the tephra mods have stock fuel and timing maps?

I know I'm asking a lot of somewhat silly questions but I figure that if I have the question other people probably do too.

If you edited the 9653 rom then you might of accidentally deleted something because my rom shows the maf scaling. And like i said before it is easy to get rid of the rear o2 code with out the tephra mod. Using another table (periphery bit) you can disable the ecu's check for rear o2, egr, idle, etc. A word on maf scaling is that if it is not scaled correctly (probably won't be) there is a chance that your car might not want to stay on from running too rich/lean at idle. That's easily fixable but when i did it i though something else was wrong with my car.

 

[tom04841]

If you edited the 9653 rom then you might of accidentally deleted something because my rom shows the maf scaling. And like i said before it is easy to get rid of the rear o2 code with out the tephra mod. Using another table (periphery bit) you can disable the ecu's check for rear o2, egr, idle, etc. A word on maf scaling is that if it is not scaled correctly (probably won't be) there is a chance that your car might not want to stay on from running too rich/lean at idle. That's easily fixable but when i did it i though something else was wrong with my car.

The 9653 tephra modded rom doesn't have table values listed. I don't know whats up with that.

 

[the_mork]

I think that it might just be modified in a different way but I'm not sure right now. For the moment I'm ditching the tephra mods entirely until I can come up with a rom that gets my car to idle. It will turn over and catch then die immediately right now. I was going to install some evo8 injectors and see if that helped but I dropped one so I'll need a new pintle cap before that happens. For now I'm back in the house recharging the laptop and modding a couple of base roms with the proper scaling.

I have a 97 so I shouldn't need to change the firing or injector order right?

 

[the_mork]

I am very pleased right now.

I just switched to a 9927000 EDM Ralliart rom that I downloaded from aktivematrix.com that is bone stock except for disabling the immobilizer and changing the maf scaling, size, and injector size.

The car idles better than it did with the 2g ecu and has no CEL.

What is most interesting to me is that from what I can tell there is no jumpy tach issue. I managed to get the car to also run on 94170015 rom but it had a CEL (as expected) and the tach was all over the place. I'm not sure if I would see a jumpy tach with the 9927000 if I played with it more but for the moment I'm satisfied and I'm not going to do anything more with the car until I get my interior put back together and install my wideband.

 

[the_mork]

The 9653 tephra modded rom doesn't have table values listed. I don't know whats up with that.

I just replaced my metadata from ecuflash with an original metadata file and then added the tephra mods back in and I have maf scaling back so I'm not sure what is really going on here but you might try that. I want to move away from the 9927 because of the inverted load and other issues that jjgriz reported.

 

[mike96]

I think that it might just be modified in a different way but I'm not sure right now. For the moment I'm ditching the tephra mods entirely until I can come up with a rom that gets my car to idle. It will turn over and catch then die immediately right now. I was going to install some evo8 injectors and see if that helped but I dropped one so I'll need a new pintle cap before that happens. For now I'm back in the house recharging the laptop and modding a couple of base roms with the proper scaling.

I have a 97 so I shouldn't need to change the firing or injector order right?

does the check engine light flash when you turn the car on? if so the reason the car catches then dies right away is because the tephra mod is active. check the tephra mod options in ecu flash and make sure that "enable auto-valet on fresh ignition"is set to 0, if not then you need to step on the gas pedal for about 5 seconds, or until the check engine light starts flashing again. also make sure that if you can look at periphery bits make sure FAA bit 3 is 0.

 

[the_mork]

Ah, I see. I hadn't even thought about valet mode. I have it fixed in the rom that I'm working on right now but that does make a lot of sense.

 

[Sam@RRE]

I'm not touching that one.


The EVO8 fuel and timing maps can be copied into ECMLink at any time.

ECMLink configs

Thomas Dorris

Just to add to Thomas, this whole evo8 ecu thing is up to the community. I'm actually quite proud of how far this got, and I thought the DSM community turned into a bunch of noobies asking the same questions over and over and the same "plugs, plug wires, and boost leak" answers over and over. This has gotten far, it's a bit rough still but is a cheap solution for those who don't mind doing some homework and learning something new on their own and becoming more knowledgeable. Not for a newbies who expect things on a silver plate and answers to life's questions answered for them.

DSMlink V3 has every capability of the EVO8 ecu, and a bag-o-cheetos. I've had a liberty of tuning a 1G on V3 last friday and I must say, very impressive. Logging capability in itself is worth every penny. V3 logging is still light years ahead of evoscan. Your toon will only get as good as the feedback you get, ie. tooning with a wideband vs. without a wideband. Or you can go with the good ol' "how long of a black strip you can lay down" to give you feed back.

Thomas's DSMlink is a product of years of his work, knowledge of the DSM ecu, and coding skills. It's all there, works flawlessly, user friendly, and is just downright bad ass.

I honestly had gripes about V2.5 when my coworkers ran AEM and I noticed how well their cars drove and ran all around and the evo's with load based maps drove great all around and my car would be sorta on/off switch to running good partial and effine bad ass thug life tupac at WOT. I was just about to jump on the AEM bandwagon and saw previews of V3 while it was still in development and figured I'd sit and wait. I don't have it in my own car yet (still on V2.5 because I'm broke ) But after tooning that 1G on friday night, I must say, that car feels great all around (although it was a car meant for drag racing and wont be seeing much partial throttle) It sure as hell ran better all around than my car and once I deal with my problem with why the police hate me and get some money that wont go to paying off CA's debt and hiding it from the Wifey, I will be upgrading to V3.

 

[mike96]

to be honest i have had my EVO8 ecu running my car now for about 2 - 3 months and there were a few times where i was about to switch to DSMlink. but i finally got the car running well enough to the point where i am now having to fix other things before i make the switch to speed density. so far the only problem i have with evoscan is that when i switched over to the new ROM i lost my wide band support but i hope to have that fixed soon. besides there is always logworks....

 

[jjgrizz73]

Well quick update, the inverse load and injector pulses disappeared when I switched back to the 94170015 rom but of course the crank/cam CEL's cause a problem. I do have the car running decently (base tuned) with this rom and codes but am looking into switching to the 9653 rom. I disabled the immobilizer, fixed the injector scalings, throttle points, etc. already. I didnt flash it yet because I wanted to know from someone using this rom what problems occured if any and how well it was working for them? My ECUFlash does not have the 9055 xml to modify so I figured Id stick with the 9653 rom.

 

[mike96]

i ran the 9653 rom for a while. car ran good for me with that rom, only issues i had were that every now and then i would get a CEL for the alternator and idle circuits. then once my rear o2 sensor went dead i tried to do the resistor mod to get rid of the CEL for the heater circuit but could never get it work right.

 

[jjgrizz73]

What Rom are you running right now?

 

[the_mork]

i ran the 9653 rom for a while. car ran good for me with that rom, only issues i had were that every now and then i would get a CEL for the alternator and idle circuits. then once my rear o2 sensor went dead i tried to do the resistor mod to get rid of the CEL for the heater circuit but could never get it work right.

Try just leaving the rear o2 sensor hooked up to the harness and wire it up somewhere out of the way. This should take care of the CEL.

 

[mike96]

What Rom are you running right now?

right now i am trying to get a 9055 ROM tuned in while i wait to get a 3bar map sensor and MAT sensor installed so i can swap over to speed density.

Try just leaving the rear o2 sensor hooked up to the harness and wire it up somewhere out of the way. This should take care of the CEL.

i did that for a while and that is what i think made the sensor go bad, i am thinking it had to work harder to keep it at operating temp.

 

[the_mork]

I think you may have something else going on. Have you gone back to an o2 sensor in your exhaust and did it fix the problem? If it is persistent regardless of anything that you do I would suggest finding out what fuse the o2 heater circuit is on.

 

[mike96]

right now i am not to concerned because i found the periphary bit to turn that check off on the 9055 rom, for some reason i cant get it to work with the 9653 rom. besides if it were the fuse i should be having problems with other things as well.

 

[jjgrizz73]

You could have also tried putting in an anti-fouler with the correct threads to move the sensor out more. I had to do this to clear the CEL from not having a cat on my car.