Here at Reverse Code we carry out performance and economy remapping to all common rail, pumpe duse, rotary pump diesel powered and petrol vehicles. We offer stage 1, stage 1.5, stage 2, stage 3 and stage 4 levels of tuning. For stage 3 and stage 4 tuning sessions we will require your vehicle to be left with us for approximately 3 days for hardware and software to be installed. 


We write all of our tuning files to each vehicle in our premises. This is known as custom tuning. Because we write our own remap files and carry out various road logging of data we cannot remap your car in 30 minutes as other companies claim to do. Our work can take from 2 hours to 4 hours. You can wait at our premises while we tune your vehicle.


Reverse Code Remapping



At Reverse Code the process for performance tuning begins with a brief engine bay visual inspection to ensure oil and coolant levels are correct and to check for any abnormalities. A comprehensive diagnostics session via the OBD plug will be carried out to check if any fault codes are present. If fault codes are present we will advise the customer on what component may need replaced.

Next we will test drive the vehicle to check how it is performing in its stock form.

We will then extract a full read from the vehicles ECU flash. This will contain all the maps required for tuning. Depending on the year this vehicle was manufactured we will either extract this flash file via the OBD plug or the engines ECU will need to be removed, opened and read on the bench through bootmode.

When we have read the full flash file we will load it into our hex editing software for analysis where we will determine if the file is 100% original or if it has been modified by another company previously. We will then begin to identify maps in the file.
These include and not limited to accelerator pedal, mass air flow, manifold absolute pressure, lambda, egr, beginning of fuel injection, torque conversions, torque limitations, injected quantity vs temperature, injected quantity duration, rail pressure, turbo pressure, turbo N75 and many single byte limiter values. Once all necessary maps are identified, correct factors and offsets will be applied then the tuning of these maps will commence. This can take a few hours to complete.

First revision of the tuned file will be flashed to the engines ECU. Then road logging will take place where we will carefully monitor and log various inputs to ensure fuel injection, turbo boost pressure and temperatures are as expected. If any changes to the map are required then this will be flashed to the ECU. Another road logging session will then take place until performance is satisfactory.

Please click on the WATCH VIDEO tab which will give you a preview of the complex maps identification process.