Many diesel cars are under best diesel tuner and a professional ECU remap makes a substantial difference. Power output typically rises by 20-30% and fuel economy can be improved by as much as 10% – depending on driving style.

The ECU controls a variety of engine parameters including ignition timing, fuelling rates and more, and a skilled technician can tweak these to deliver a better performance without impacting reliability. Many diesel owners report improved engine performance, smoother drive characteristics and even reduced nitrogen oxide emissions, which can help them meet future air quality targets.

Unleashing Diesel Dominance: Navigating the Quest for the Best Diesel Tuner

However, not all ECU tuning is the same. In some cases the remap may cause other car components to wear out faster if it’s not done correctly. These include the cylinder head bolts, injectors and clutches. This is why choosing a recognised tuning company is important as a bad map can do more damage than good.

One of the biggest things to watch out for is tuning companies that focus too much on delivering higher “peak power” as this can have serious effects on drivability, fuel efficiency and reliability. A good remap will always prioritise torque and engine efficiency whilst also ensuring your car is still safe to use for daily road work, family trips and towing.

There are a lot of cheap modules available off the net that claim to give diesel enthusiasts glorious power gains for as little as PS200-PS500. Most of these do nothing more than pump up the pressure in the common rail system by making a small modification to the fuel sensor so it reads lower than it should, giving the impression that the engine is’more powerful’.