ahmedshaikhani

Hello everyone, I'm using Evo 4 and I want to swap Evo 7 ecu. A friend of mine is selling Ecu MR985180, is it the correct ecu ? Secondly I need to rewire few wires, I got some information of rewire please confirm me is it correct or not

1- Swap cables 8 and pin 22 fuel pump relay with AC control relay
2- Disconnect pin 87 AYC/ACD signal
3- Connect Cable 20 to pin 32 Rad Fan Hi to condensor fan Hi
4- Connect Cable 21 to pin 34 Rad fan lo to condensor fan lo
5- Connect cable 6 Secondary air system to pin 53 of Evo 7 ECU
6- disconnect pin 91 or rewire for IC sprayer manual operation
7- Evo 4 only disconnect pin 40 and ground cable or connect to pin 92 sensor ground
8- Evo 4 only disconnect pin 33 if alternator is not charging battery

I have been reading about changing ROM, can someone please highlight this also ?

Thank You

foxbat

No need to rewire the IC sprayer, 4 has only manual spray.
You need to attache a wire to pin #79 to be able to flash the ECU.
The 4 has smaller 510cc injectors, so, you'd need to install 560cc injectors (Evo 5-9) or to rescale the 4's injectors in the 7's rom.

todd6027

iTrader: (10)

depending on which 7 the ecu is from id leave 1 as is for the min when you have the rest swapped , ign on open evoscan then actuators and hit run fuel pump if the pump runs all ok if a/c fan runs then swap 8 and 22

6- not necessary as what was said above
7- hot cat light only applies to evo4 ecu just remove the bulb from the dash cluster
8- only applies to fitting evo6 ecu in a 4

90550001 is the best supported evo7 rom

you will need to disable the immobiliser in the rom also
disable fr o2 sensor heater(evo4 has 2 wire only) /
turn off egr ( no hardware in evo 4 )
turn off rear o2 (No hardware in a 4 also not fitted to some evo7 )

ahmedshaikhani

Thank You everyone for the quick response, one of my friend has Evo 7 ECU Part Number is MR985180, will this ecu work ? This Ecu has got 3 Plugs not 4, can anyone shed some light on it please ?

foxbat

3 plug! This could be either a 7 GT-A ECU, it will not work or an 8's ecu, it would work if u perform all the needed swaps. Can you open the plastic casing & check the main chip # ?

I suggest you install 5/6 ecu & you won't have to do any of the swaps, just a wire to pin 79 to be able flash the car.

MRGEVO

MR560648 is the part number for an evo 7 ecu with 4 plugs.

That ecu number comes up as evo 7 GTA. I wouldnt bother with it.

I highly recommend using the evo 7 ecu, many more benefits over an evo 5 or 6 ecu.

foxbat

Such as?

todd6027

iTrader: (10)

no longer is that the case

ahmedshaikhani

I just contacted my friend he said it's 4 plug ecu, should I go for this ecu or should I wait for MR560648 ?

todd6027

iTrader: (10)

@op

you can use 5/6 ecu plug in with 560cc (evo5 on injectors) and a wire to pin 79 for flashing and then check its charging .

or evo7 4 plug/evo8 (260 uk) 4 plug /evo8 usdm 4 plug

all the latter need wires swapping and modded rom

ahmedshaikhani

The Ecu which I have in option to buy is MR985180 4 plugs, for reference I have posted a picture of a similar ecu, please confirm me that will this ecu work ? I know it's not plug and play though need to do some rewiring.

todd6027

iTrader: (10)

no it wont its a auto box ecu

stunt2

iTrader: (8)

hey todd, can you explain bit further, why that ?

I'm currently running 96530706 v7 on my IV and any benefits to switch to that rom above ?

todd6027

iTrader: (10)

It was a ralliart evo 7 rom to begin with the 9653 was an 8 rom

philsgsr

As already said this is for an Auto Evo 7 GTA would not get it for anything other than another auto car.

I am investigating this exact ECU on my car and it appears to have the Evo9 automatic Wagon Rom 88780004 in it.