MEMS 2J Remapping
I am able to modify 2J ECUs to allow them to be remapped using one of the following methods
ECU modification - OBD/diagnostic cable programmable
The modification includes: an expansion board fitted inside the ECU, a new rewritable chip, a brand new laser cut aluminium ECU lid, and a diagnostic cable.
This allows ECU map updates to be carried out via the diagnostic cable, the ECU does not need to be opened again.
Map updates can be done "live" with the engine running, the active table cell is highlighted to help with steady state/rolling road tuning.
This is being offered at £300 which includes ECU modification, cable, and insured return postage within the UK.
ECU modification - Chip swap
I can also offer a less impressive modification which involves installing a rewritable chip into the ECU and providing a chip programmer box.
This method means you need to open the ECU and remove the chip each time you want to make an update or map change.
This is being offered at £200
As part of my work on these ECUs, I have a repeatable method of finding the "tables" or "maps", this is normally a time consuming or expensive process involving having to buy a "map pack".
I have built an editor for the ECU files/maps, linked above.
Some tables are still unknown but the important ones such as fuel and timing have been found, others include idle speed setting, rev limit.
During the modification process I will take a backup of the stock ECU data using a combination of BDM and also an external programmer with the correct clip.
This ensures that when you receive your ECU back, it will function exactly the same as it originally did, and you will always have the original backup files if you would like to return it to a stock state.
At the moment I am not planning to offer any specific "tuned" or "stage 1" calibrations, I am simply giving you the ability to either tune the ECU yourself or have someone qualified do it if not.
I suggest owners of cars with modified engines should purchase a wideband lambda sensor and controller in order to more accurately monitor the air-fuel ratio of the engine.
Most of these kits provide an "emulated" narrowband output wire which can be wired into the stock ECU (if it needs a narrowband signal). This allows the stock ECU to run normally but while providing you with a much more accurate reading of the AFR.
Using a diagnostic cable you can connect and "log" a journey in the car to see what state the fuelling is in.
As above, this will be much more accurate if using a wideband lambda controller, a narrowband lambda is not accurate enough to tune from.
This can be useful to correct major fuelling issues without having to pay for a rolling road or tuner, but will never be the same as having it properly tuned on a dyno.
2J ECU with new cover and weatherproof USB connector
Modified 2J ECU with internal programmer
Mini MPI Stock Fuel Table
Mini MPI Stock Ignition Map
External ROM Chip Programmer