VR4 Successfully Flashed

[Davezj]

the guide does seem to suggest that a wideband sensor is a must for tuning performance.

[Nutter_John]

Yep Dave trying to tune it without a view of the AFR's is like playing russian roulette

[kc427]

the guide does seem to suggest that a wideband sensor is a must for tuning performance.

and my friend suggests installing EGT gauge as well

[Nutter_John]

Well yes techincally an EGT is good as you can judge how close to det you are from the temps .

But for the level that most people will do the AFR is an easier value to work with

[AderC]

One thing I'm not understanding even after reading the guide is how to tweak boost levels in ecuflash - seemed straightforward in ecuedit but theres no obvious table to play with in ecuflash.

Can anyone give me a steer?

The XML definition file isn't complete yet. Should be possible once the maps are properly defined.

[kinkyafro]

The XML definition file isn't complete yet. Should be possible once the maps are properly defined.

Ahh thanks for the answer thats been bugging me for a few days now. Assumed I was missing something as it's already in the ecuedit definitions. I guess it's more complicated then copying and pasting from the ecuedit defs then.

[kinkyafro]

Right I'm planning to attempt dumping the M28F102 flash chip. I'll report back with a rom image or WTB:ecu once my stuff arrives from China.

Ok update time...

First of all I wish I'd followed my own advice as the topwin eprom burner does not appear to be compatible as claimed and may have even trashed my ecu flash rom....

anyway I have removed the flash chip, got a socket ready to go on the ECU board and sourced some equivelant flash chips including a one time burnable chip which with the addition of two toggle switches and four wires will (I believe) allow real time switching between 4 different maps.

Unfortunately I'm now at the point where i need to get a better eprom burner from abroad once funds allow at the end of the month so don't expect news anytime soon. Hopefully I'll have something to report in late September.

[scott.mohekey]

What problems did you have with the eprom burner? Have you considered making one with an avr/pic?

[kinkyafro]

What problems did you have with the eprom burner? Have you considered making one with an avr/pic?

it refused to recognise the eprom so I obtained a brand new equivelant chip thinking i'd overheated the original during removal which it did exactly the same with - after a bit more diddling around i got a message from my laptop about excessive voltage on the usb port accompanied by a burning smell. at that point I decided against using the topwin anymore

as for avr/pics i'm no electronics whizz and don't really know enough but looking at the pins for the 4 megabit prom i have in mind all you have to do is manually switch addressing pins to flick between maps (in principle at least).

I've already got a two megabit one ready to test the theory but need to get a result with a regular 1 mbit first.

[scott.mohekey]

Either the topwin doesn't support the chip, or the topwin isn't working correctly. An excessive voltage warning over USB from your pc suggests there was probably a short somewhere.

[SquattingDog]

As far as I know, the 7202 processor can be flashed, but not the 7203.

By the way, my ECU is MD340288 plastic case.

THIS. I have this processor in my RVR X3 ECU case #MD352553. I have an OpenPort 1.3U cable, from EvoScan (Hamish @ Limitless) and can read but not flash my ECU. I have the XML for it, but cannot reflash.

Is there anyone in the North Island (ideally Auckland) who I can come over and use their OpenPort 2.0 cable to attempt a reflash of my ECU before I got out and blow $170USD on one of these cables?

I'm really desperate here guys, have a full set of 800cc injectors and a fuel pump sitting here, waiting to go in ><

[dublee]

Quick Question,

Can a flashable ecu from a pre-facelift be put into a facelift and from an auto to a manual?

Basically i want to buy a flashable ecu for my facelift manual legnum, will any flashable ecu do?

[Turbo_Steve]

If you have a facelift manual, you may already have a flashable ECU?

[Davezj]

as long as it is not too new. the newest facelift (aprox 2001-2003) have the 7203 processor which i don't think is flashable.

but if you have a 1998-2000ish it will be a 7202 processor and you are a lucky lucky boy!

you can flash to hearts content. but not in public you might get arrested.

[X-COM]

actually 1999 is also equipped with 7203, at least 70% regarding to mitsubishi data. you would like to have early 1998 to be certain that there is 7202 onboard.

enyone cracked already bost pressure settings?
can one share his manual facelift ECU .hex for research purposes?

[phosty]

Here's a manual ecu rom file - I think it's a PFL though (I bought the ECU).

[kc427]

Here's a manual ecu rom file - I think it's a PFL though (I bought the ECU).

This is a plastic case ECU(MD340288), right? It's 7202, and you can use it to re-flash

[Davezj]

i have a MD340289 which is a plastic case 7202.
Prior to getting this ECU, i thought all the MD340289 were metal cased 7201 but they are not.

[phosty]

Yes - it's from a plastic cased MD340288/7202 ecu. I have successfully modified the rpm limits to prove it is reflashable back to a 7202.

However I have a a few rom images (IDs EM2004, EM2005 and a Tuned EM2005 which I believe is from a Mines ECU) that I've pulled of the various forums and done bitwise comparisons - the tables differ a bit as you would expect. But I was working under the assumption (possibly incorrectly) that you could write any of the rom images (i.e. one from a 7203 or the Mines ECUs for example) to one of the 7202 ecus without issue.

Though the chap who has read the eeprom on the 7201 boards seems to suggest that it's rom image is different in structure.

No warranties given or implied though!!! Use at own risk.

[GalantOnly]

i have a MD340289 which is a plastic case 7202.
Prior to getting this ECU, i thought all the MD340289 were metal cased 7201 but they are not.

MD340289 for PFL autos
Metal case MH7201FS
Plastic case MH7202F