ECU Remapping in Coventry

Changing the engine software on your own vehicle is legal in itself. What is not legal is running a vehicle whose emissions equipment has been interfered with, and we do not do that work. Your obligations are to keep the vehicle in a roadworthy condition and to tell your insurer about a modification. Both of those are simple enough to deal with, and neither is a reason to avoid having the job done properly.

A box sits between a sensor and the ECU and tells the ECU something that is not quite true, so the engine reacts in a way its own software never intended. A remap changes the software itself, so the engine is still working from one consistent set of instructions with all its own protections intact. That is why we do the second thing and not the first.

Not by itself. Age and mileage matter far less than condition and history. A well looked after vehicle with a lot on the clock is often a better candidate than a neglected younger one. What we are looking for is an engine that is healthy now, holding boost as it should and not already struggling. If the logs say it is tired, the map gets kept modest or we do not do it.

Both. Modern turbo petrol engines respond well and the process is the same one: read the original, log it on the road, write for that vehicle, log it again. Naturally aspirated petrol engines are the ones where we are most likely to tell you it is not worth the money, because there is often very little in them once the marketing is taken away. We will say which yours is.

If a service is due anyway, have it done first. Fresh oil, a decent filter and a fuel system that is not struggling all make the logging more representative and the result better. If the service is not due for a while, do not rush it forward on our account. What we do not want is an engine that is overdue by thousands of miles, because then we are measuring neglect rather than the engine.

Yes, and they often do. Condition, servicing, what has already been done to the vehicle, how it gets driven and what the owner actually wants from it all push the decisions around. That is the entire argument for writing a file on the vehicle rather than handing over something prepared in advance for a model name. The car in your driveway is the one that gets mapped.

Usually, and that is a better place to start than booking a map and hoping. A description of when it happens, at what revs, hot or cold, and whether anything has appeared on the dash normally narrows it down quickly. If it points at a mechanical or emissions fault, you get told that, because a map laid over a developing problem hides it for a while and then costs you more.

A little, sometimes, and only because the engine is doing slightly different things rather than because anything has been altered on the exhaust. A diesel may sound a touch more purposeful under load. Nothing about a properly written map should make a car loud, rough or unpleasant to sit in, and if yours ever did, that would be something to ring us about rather than live with.

We write maps on the basis that everything fitted to the vehicle stays fitted and stays working, so the test is looking at the same hardware it would have been looking at anyway. We will not do work that makes a vehicle unlawful to use on the road, which has been asked of us before and will be refused again. If you have specific worries about your vehicle, raise them when you ring.

Mostly because the work behind them varies. Loading a file bought in bulk takes a few minutes and involves nobody driving anything. Reading the original, logging the vehicle on the road, writing for it and then logging again takes an hour to ninety minutes and involves somebody who can interpret what came back. Those are two different products with the same name attached to them.