EVO ECU vs 3G ECU

I was speaking with someone about what ecu to run in my car. i was going to just run a 97 eclipse ecu and leave it at that. I was thinking of maybe running 3G manual ecu because of the flash capabilities. this person was saying that a evo ecu would be a little better option. mainly because of the fact the ecu on the evo can control boost and i don't need to run a manual boost controller.

what do you guys think? who running what ecu over the other? i seen some evo ecu's going for $230. how much are 3G ones?

i don't plan to run DSM link or tune it myself. i know a tuner who tunes with flash.

also with my setup i will be running a maf translator II

The evo ecu controls boost thru the WG solenoid which we dont have, so thats more wires to be added.

Best bet is 98-99 DSM flashable ECU. You'll do the same amount of rewiring as if you were using link but the price of the ECU is in the low $100. Thats what I have in the green G.

I'm in the process of rewiring a 97 Galant harness to use a 99 GST ECU and there is a fair amount of rewiring involved. Adding one more pair (set?) of wires for wastegate control would be very minor if that appeals to you. The 3G Eclipse ECU might be the least expensive route if you can grab one from a you-pull-it yard or check eBay. Having a GST/GSX harness on hand to pull parts from has also been really helpful/necessary.

Hmmmm. Some interesting points here. What's the difference in wiring a 97 2G ecu vs the 99 2G?

There isnt.

Just the flash capability because 97 is not a black box ecu

I was reading that the 99 black boxes have some limitations on scaling. What do you use to tune a 99 black box? Same as Evo 8/9?

yes. you use ecuflash to tune and evoscan to log 2g Ecus.

evo ecus are going for $250 now? Mine was $100 5 years ago

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Originally Posted by qnz

yes. you use ecuflash to tune and evoscan to log 2g Ecus.

evo ecus are going for $250 now? Mine was $100 5 years ago

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ya, people are catching on i guess lol


i'm still searching. what year ecu's work?

Yup, they got word the DSM crowd was after them and the price went way up. The 3g ECU will probably do the same but salvage yards may be slow to catch on to that one. Plus there were a lot more of them made.

can maybe one of the 8G guys could chime in and tell me the difference running a 3G ecu over a Evo ecu



i can get a 3G one real cheap i mean rape cheap.


what ecu's should i look for? part numbers and such for both evo's and 3G's


i want to make sure i have everything covered so when i take the car in for the swap i won't have headaches. i just want to get the car running on a base line with the built motor. make sure the motor is good before tuning. plus i'll need a stronger trans....

Its been a long time since I've kept up with Rom Flashing news, but IIRC, couldn't you flash an entire evo rom onto a 3g ecu also? I thought I remembered reading about that

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Originally Posted by qnz

Its been a long time since I've kept up with Rom Flashing news, but IIRC, couldn't you flash an entire evo rom onto a 3g ecu also? I thought I remembered reading about that

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YOI ARE CORRRCT,

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Originally Posted by kolio

can maybe one of the 8G guys could chime in and tell me the difference running a 3G ecu over a Evo ecu



i can get a 3G one real cheap i mean rape cheap.


what ecu's should i look for? part numbers and such for both evo's and 3G's


i want to make sure i have everything covered so when i take the car in for the swap i won't have headaches. i just want to get the car running on a base line with the built motor. make sure the motor is good before tuning. plus i'll need a stronger trans....

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Any 3g manual ecu will do. No specific numbers to look for or anything. Same thing applies to the evo. But as mentioned. Eclipse ecu is capable of running the evo rom.

I still have the ecu we pulled from that convertible 3g when we pulled my manual tranny for my swap when you helped me and matt and I plan on using it.

So just go get a 3g ecu from a manual car and you are good to go.

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whats the diffrence between the evo and 3g? nothing lol

so whats the point then. i'll grab a 3g one then


who has a pin out for the ecu?

there is no difference once the evo rom is flashed on the 3g ecu. save yourself the money

Ok I grabbed one from an 03 manual v6. With a foot of wiring. Ican someone help a brother out and test it. Maybe flash a evo rom with no imobilizer

Not sure it the v6 ecu is the same but you need an i4 ecu in order to flash the evo Rom on to it..

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Originally Posted by finald8ta

Not sure it the v6 ecu is the same but you need an i4 ecu in order to flash the evo Rom on to it..

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from what i understood it was any 3g manual ecu.

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Originally Posted by kolio

from what i understood it was any 3g manual ecu.

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Yea from a 4 cylinder not a v6

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i remember reading v6 are flashable.


anybody want to chime in?

Doesn't matter i4 can only use the 4 cyl ecu

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I did a lot of reading on this in preparation for helping my brother out with a 3g ecu in his GS. From what I've read on the 3g Forums, it Must be from a I4 Manual 3g Eclipse. Also to avoid earlier models if possible 01's I think.
Not all black box ecus from dsm's work either from what I've read on Dsm sites. Luckily the one I have was from a 99gsx and is running fine with ceddy mods flashed to it. I've found a remote tuner thats big over on the evo forums to street tune it.

I just finished a 3g turbo project and we ate using an 01 ecu I think you want to stay away from 2000 yr

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Originally Posted by phizzalot

I did a lot of reading on this in preparation for helping my brother out with a 3g ecu in his GS. From what I've read on the 3g Forums, it Must be from a I4 Manual 3g Eclipse. Also to avoid earlier models if possible 01's I think.
Not all black box ecus from dsm's work either from what I've read on Dsm sites. Luckily the one I have was from a 99gsx and is running fine with ceddy mods flashed to it. I've found a remote tuner thats big over on the evo forums to street tune it.

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i got to have someone test my ecu out for me. i got a 99 gsx one

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Originally Posted by kolio

i got to have someone test my ecu out for me. i got a 99 gsx one

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What does the numbers on the ecu say?
These are DSM ECUs that are Flashable.
1998 -> 7/97-5/98 MD346675(FWD) and MD346676(AWD)
1999 -> 6/98-4/99 MD359402(FWD) and MD359403(AWD)

im running a 2002 fedspec i4 3g ecu with a 2006 EDM EVO Rom in my 6g, you will be extremely happy once u swap

Out of curiosity, and to confirm is the wiring upgrade to a 3g ecu the same as to an evo ecu?

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Originally Posted by phizzalot

Out of curiosity, and to confirm is the wiring upgrade to a 3g ecu the same as to an evo ecu?

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Yes.

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Anybody willing to make plug n play adapters? I have a GS and want to use a flashable ecu but I don't want to cut my stock harness.

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Originally Posted by Armandotech

Anybody willing to make plug n play adapters? I have a GS and want to use a flashable ecu but I don't want to cut my stock harness.

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PM me

Hey guys I just came across this thread and was wondering if this would work in my 8g with the wiring harness and ecu from a 3g manual eclipse. I would think so because they share the same motor so the harnesses should be the same in both cars

Oh and this wouldnt work for an auto 3g ecu?

I believe only the later 3g manual ecus are pin compatible to the Evo8 ecu. And there are differences in the harnesses along the years for both Galant and 3g. You should explore the Big Maps option first before you go swapping ecus.

Big Maps option?

https://www.thegalantcenter.org/show...-stock-pcm-Rom

Oh ok