98 ECU part number md347252 flash capable?

[ChargerX3]

The 98 SOHC is the same PCB as the 98 SL, and 98 VR4 but it will need many more components added/replaced to make it work. At this time, nobody has successfully converted one over yet.

In other news, today I just got a 1999 3000GT VR4 Euro flash ECU working on my 93 RT/TT. What makes it interesting is that it uses the old style ECU connectors, so it is quite possible to move just a few wires around on the factory harness without the need of a conversion harness!

Yea, i was going to tackle this one as i only have the SL and VR4 for the 98's. Wanted to compare it to the Diamante which i believe is identical.

Great to see you get that ECU working. Was hoping those corrections in the code would get you running. Didnt know they had the same harness though as the 1st gens. Would make for a great alternate. How much are the Euro ones going for and are they readily available?

[BlackStealth]

The 99 Euro ECU has a 4 plug connector the same found on 94-97 USA cars. A total of 9 wires have to be moved on the 94-95 USA harness to make it a perfect plug and play. Super easy.

On the 91-93 USA vehicles, there's a little more work involved, a 4th connector(12pin) is required and wiring in an OBD2 connector. Surprisingly, it's also just 9 wires that needs to moved to make it a perfect plug and play.

I'm going to put the Euro ECU up for sale soon as I don't need two.

[99 vr4]

Can an 98 ECU part number md347252 be modified or flashed?

Even though this is old, I figured I would throw this out there. I have converted many SOHC ECU's for the VR4 Clone ECU. In fact I have converted four or five MD347252 ECU's into full VR4 Clones. The SOHC is very easy to modify and only takes a few more components than the DOHC Montero.

For pricing and ordering information, please go to Ordering

[Dbeltran24]

Even though this is old, I figured I would throw this out there. I have converted many SOHC ECU's for the VR4 Clone ECU. In fact I have converted four or five MD347252 ECU's into full VR4 Clones. The SOHC is very easy to modify and only takes a few more components than the DOHC Montero.

For pricing and ordering information, please go to Ordering

When converting SOHC ECU's into VR4 Cloned ECU's, are hardware modifications needed? or is it only the code that is changed? Just trying to figure out if the SOHC ECU can be flashed in stock form or if the mods are what make it flashable. Also, can EVOScan pull data from a SOHC ECU or is a chrome-like rom needed first?

[BlackStealth]

SOHC needs hardware modifications if you want to use it as a VR4 ECU. SOHC can be flashed, I've flashed mine with Chrome 2.0, I use this ECU for bench testing only, not for driving. Evoscan works with SOHC ECU non-chrome and chrome versions.

[Dbeltran24]

SOHC needs hardware modifications if you want to use it as a VR4 ECU. SOHC can be flashed, I've flashed mine with Chrome 2.0, I use this ECU for bench testing only, not for driving. Evoscan works with SOHC ECU non-chrome and chrome versions.

Thanks for the info.

[ChargerX3]

Ive flashed a SOHC and a Diamante ECU and ran it. Ran like crap, but it ran. I was still messing with some things though.

[99 vr4]

When converting SOHC ECU's into VR4 Cloned ECU's, are hardware modifications needed? or is it only the code that is changed? Just trying to figure out if the SOHC ECU can be flashed in stock form or if the mods are what make it flashable. Also, can EVOScan pull data from a SOHC ECU or is a chrome-like rom needed first?

Hardware modifications are required. The ECU is flashable and you can load VR4 code with no problems but it will not run until AFTER the hardware modifications are done.

Ive flashed a SOHC and a Diamante ECU and ran it. Ran like crap, but it ran. I was still messing with some things though.

Oh no . . . this will cause problems both short term and long term engine reliability. You NEED to have the hardware modified. This can not be compensated via software.

Don't waste your time and your engine trying to make this work. Just toss it out or trade it in for a core.

Brett

[donniekak]

Ive flashed a SOHC and a Diamante ECU and ran it. Ran like crap, but it ran. I was still messing with some things though.

If you have a dohc ecu, it's easy to see the differences.

[ChargerX3]

Hardware modifications are required. The ECU is flashable and you can load VR4 code with no problems but it will not run until AFTER the hardware modifications are done.



Oh no . . . this will cause problems both short term and long term engine reliability. You NEED to have the hardware modified. This can not be compensated via software.

Don't waste your time and your engine trying to make this work. Just toss it out or trade it in for a core.

Brett

Brett,

You can run the car with the lower populated boards, but yes it does cause some problems because of unpopulated circuits that the VR4 needs to fully operate properly. I know some of the guys had issues trying to start theirs because of the resistance value of the ignition circuit. Mine would start though. Now i only use the diamante ecu to preflash my rom, so i dont blow out my vr4 ECU.

BTW ive already PM'd you about some conversion options, but have not heard back. PM me when you get a minute.

If you have a dohc ecu, it's easy to see the differences.

Donni,

I know this. They are all the same for each year minus how they are populated on the board.