Liter Electric Hot
An ECU remap is a method of enhancing the electronic engine management system of a car by updating the software installed by the manufacturer. The ECU (electronic control unit) is updated with a different set of commands that help the engine generate more power and run more efficiently.
Car manufacturers mass produce engines for use in countries all over the world and this means they have to be designed to handle a range of different operating conditions, including different grades of fuel and various climates, but there are other pressures including the need to reduce harmful exhaust emissions. Manufacturers will often program the engine control unit so that the engine is capable of passing the stringent emissions tests with a low emissions value, meaning the car will fit into a lower road tax and company car tax band, but this is not necessarily the best setting for that engine to run at its best in the real world.
This gives an engine tuner the opportunity to improve the efficiency of the engine by reprogramming the electronic control unit to make the most of the market in which it is being used. By programming the engine to run with the specific grade of fuel and the air temperatures of the car’s home market it can gain better throttle response, generate even more power and torque, and even use less fuel.
Almost any car that has an electronic engine management system can be given an ECU remap, and that applies to both petrol and diesel engines. Results can vary but an ECU remap will always produce the best results when applied to a turbocharged or supercharged engines. This is because raising the boost pressure of the turbocharger or supercharger allows much higher gains in power to be achieved, when combined with the correct ignition timing and fueling adjustments.
However, it is sometimes possible to achieve significant power gains in naturally aspirated engines. Some manufacturers offer the same engine in different models with varying levels of power, and this is done by de-tuning the engine with a different ECU map. This makes it possible to remap the ECU to release the same level of power as the higher tuned version. An example of this is the 2.0-liter petrol engine found in the Volkswagen Golf, which is a de-tuned version of the same engine found in the Golf GTI.
Installing an ECU remap is a relatively simple task. Most new cars have a diagnostic port somewhere in the engine bay or dashboard that allows mechanics to download error codes from the ECU when the car is in for service, and this same port can be used to upload the new ECU remap using a laptop or special tuning devices. Some older cars will require the original chip on the ECU to be replaced, which requires more technical expertise and can make the upgrade more expensive.
The actual power gain from an ECU remap varies between models. Some engines may gain as little as 5% while some may gain as much as 40%, but typical increases in the power of the engine would be around 15-20%. The extra torque means fuel economy can improve but this varies even more, mainly depending on driving style and how much of that new power you feel like using.
An ECU remap is one of the most cost-effective ways of getting more power from your car, and on some mainstream models can cost only a few hundred dollars.
Chris is a car nut whose interests include hot hatches, rallying and Formula 1. For more information about hot hatch tuning and other car-related news you can visit his website, Driving Spirit.
What temperature should I get?
3.3 liters of Chrysler electric fan is on track after lower hose is heated. indicator higher.The is a bottom hose was cold to the touch before.
The bottom hose means nothing. The upper hose should be too hot to touch if the refrigerant does not exceed the OEMs (original equipment manufacturers) Evaluation of the thermostat. I'm betting yours has a 195 degree thermostat. If you have a heat meter in the car and goes past 200 degrees the thermostat needs replacing. Cooling systems should be drained and rinsed clean every three years to the point to keep it free from corrosion and rust. Be sure to look in your operating manual for the correct formulation of antifreeze. All antifreeze is the same regardless of the silly TV Prestone says. Modern Chrysler products should have the ZeReZa G-05 formulation. If the fan turns on when the engine is hot is functioning normally.
Zojirushi CD-JSC22 Hot-Water Dispensing Pot 2.2L
