ECU Remapping l ECU Tuning l Chip Tuning

What is an ECU ?

ECU is Engine control unit which is an electronic Control Unit. As its name tells you it is the brain of modern day cars, as it controls almost everything on your car. Todays ECU’s form a very integral and the most important role in your car.
Modern ECU’s are essentially a 32 Bit computer, having processor, RAM, and its OS stored in EEPROM. It receives inputs from the various sensors installed in car. It manages all this data coming from various sensors as mentioned below and subsequently manages the various aspects like how much fuel needs to be supplied to the engine to maintain the stoichiometric air fuel ratio, ignition timing, various parameters of turbo charger like pressure, air volume, and many other trivial and non-trivial calculations like fuel economy etc.
Engine Sensors
  • TPS - Throttle Position Sensor
  • IAT - Intake Air Temperature Sensor
  • CKP - Crankshaft Position Sensor
  • MAP - Manifold Absolute Pressure Sensor
  • MAF - Mass Airflow Sensor
  • ECT - Engine Coolant Temperature Sensor
  • Fuel Temperature Sensor
  • Vehicle Speed Sensor

What is ECU Remapping or ECU Tuning ?

ECUs use a microprocessor which can process the inputs from the engine sensors in real time. An electronic control unit contains the hardware and software (firmware). The main component on this circuit board is a microcontroller chip (CPU). 
The software is stored in the microcontroller or other chips on the PCB, typically in EPROMs or flash memory so the CPU can be REMAPPED by uploading updated code or replacing chips.
REMAPPING or ADVANCED FINE TUNING is modifying the stock map stored in flash memory which controls various aspects as discussed, which will ultimately create a huge difference in the performance of engine. 
Sophisticated engine management systems receive inputs from other sources, and control other parts of the engine; for instance, some variable valve timing systems are electronically controlled, and turbocharger waste gates can also be managed. They also may communicate with transmission control units or directly interface electronically-controlled automatic transmissions, traction control systems, and the like.
Benefits after our ECU Remapping in Turbocharged Petrols / Diesels Engines:
  • POWER by up to +40% bhp
  • TORQUE by up to +35% nm
  • Reduction in fuel cost by up to 20%
  • Improves the drivability
  • Quicker throttle response
  • Reduces the turbo lag
Benefits after our ECU Remapping in Naturally Aspirated Petrol Engines:
  • Increases POWER by up to +15% bhp
  • Increases TORQUE by up to +14% nm
  • Reduction in fuel cost by up to 150%
  • Improves the drivability
  • Quicker throttle response


All manufacturers have to limit the power and kmpl of their vehicles in order to adhere to the many different markets they face. From simple things such as differing fuel grades around the world to issues with marketing and affordability. So your car will always underperform both for power and for fuel efficiency. Our tuning releases your vehicles true potential for POWER, Fuel economy and C02 reduction.
Reasons To Remap your Vehicle:
  • Up to 20% improved fuel economy
  • Improved KMPL - Reduced emissions (subject to Vehicle type)
  • Enhanced sharper throttle response
  • Smoother more progressive power delivery
  • Power and Torque improvements
  • No mechanical modifications
  • Minimal downtime for busy vehicles
  • No on-going maintenance fees
UD MOTOR X delivers tuning to provide significant gains in fuel efficiency whilst improving the feel and drive-ability of a vehicle.

What UD MOTOR X has to offer?

Remapping your car unleashes the full potential of your car engines. You will experience:-
  • Remapping service at your doorstep
  • More Horsepower
  • More Torque
  • Better fuel economy at cruising
  • Savings of 20% in fuel economy
  • Removal of Speed Limiter
  • Safer overtaking
  • Enhanced, sharper throttle response
  • Smoother, more progressive delivery of power
  • Reliable and safe
The improvements above are all achieved by very careful matching of parameters such as fuel delivery rates & ignition timing along with adjustments to maps that electronically limit torque, throttle response and top speed. All this information in your ECU calibration file is carefully optimised to our exacting standards and then programmed back into your ECU and the vehicle tested.

Difference between REMAPPING & CHIPTUNING?

Chiptuning or chipping, as some called it, is an ancient method of upgrading a car's performance. It involves replacing the original eeprom/chip in your ECU's board with a tuned version. The improvement is usually 'raw' and not refined, usually suitable for old vehicles Pre-2000. Despite being an old technology, there are however, still a lot of chipping companies around offering the services at reasonably cheap price. Although we do not provide chiptuning services, we still retain the use of this word in our website as it may relates better to some people.
Remap on the other hand, is the most complex and comprehensive procedure to alter the most parameters in a car's ECU. It result in the smoothest, highest gain and finest drivability experience with all the enhanced parameters working harmoniously together. Process involves extracting the map from the ECU, modifies the map and then insert the modified map back into your ECU. We keep a copy of the Original Map of your car.
Extraction process of the map can be quite different depending on the type of vehicle. The easiest being extraction through OBDII, but not all cars has had this solution available. Most Japanese, Korean and Malaysian made cars' map are still being extracted manually by wire connection on the ECU itself.


Chip tuning refers to changing or modifying an erasable programmable read only memory chip in an automobile's or other vehicle's electronic control unit (ECU) to achieve superior performance, whether it be more power, cleaner emissions, or better Fuel efficiency. This makes use of the engine manufacturer to generally use a conservative electronic control unit map to allow for individual engine variations as well as infrequent servicing and poor-quality fuel. Vehicles with a remapped electronic control unit may be more sensitive to fuel quality and service schedules.
This was done with early engine computers in the 1980s and 1990s. Today, the term chip tuning can be misleading, as people will often use it to describe ECU tuning that does not involve swapping the chip. Modern electronic (OBD) control units can be tuned by simply updating their software through a standard interface, such as On Board Diagnostics. This procedure is commonly referred to as engine or electronic control unit tuning. Electronic control units are a relatively recent addition to the automobile, having first appeared in the late 1970s.
Performance gains are realized by adjusting the ignition timing advance. Different timing may result in better performance. However, to cope with advanced timing, one must run high-octane gasoline to avoid pre-ignition detonation or pinging. Manufacturers design for a specific timing and this may limit performance accordingly.
In addition, changing fuel maps to coincide with the stoichiometric ratio for gasoline combustion may also realize performance increase. Most manufacturers tune for optimum emissions (running rich to protect the catalytic converter) and fuel economy purposes which can limit performance.
Cars with a turbo fitted can have the requested and allowable boost levels raised, these applications usually have the most effect if the turbo fitted is a low pressure turbo which leaves the most room for improvement.
Another reason to change the electronic control unit map is if there are engine, intake, or exhaust modifications to the car. These "bolt-on" modifications alter the way that the engine flows, often causing the air to fuel ratio to change. Without re-mapping the fuel tables, some of the performance gains from the modifications may not be realized.





Limp mode is an engine mode that is designed to place absolute minimum stress on a engine while still providing sufficient operation to provide limited locomotion. An ECU normally puts an engine into limp mode when it knows / has senses an engine fault that could be made worse by the driver continuing to drive in their normal manner.  In effect reducing the amount of harm that an engine will suffer. So you can think of limp mode as a self defense system for engines that is deployed by the ECU to reduce damage until the vehicle can be repaired.


The sensors on a vehicles DPF can supply such signals that cause the ECU to issue a 'Limp Mode' state to the engine. This can happen when the ECU senses that the DPF charge (amount of particle matter collected) is high and for whatever reason the ECU can not either set the engine to a DPF regeneration mode or it has and the DPF charge has not reduced by way of particle burn off.


Many vehicles display a 'Regen' light on the dashboard when a DPF regeneration is required. Under normal operation the vehicles ECU should take care of this and the ECU will set the engine into a DPF regeneration cycle. Some manufacturers recommend that the vehicle be taken on a long run / experience motorway driving conditions. This has the same effect as the ECU setting an engine into a DPF regeneration mode, in both cases higher than normal exhaust temperatures are experienced by the DPF, this should result in DPF cleaning via particle burn off.