Start with the service history
Check when the car was last serviced and whether major maintenance is up to date for that engine and transmission. Tell us about recent repairs, oil or coolant use, and any previous remap or hardware change. If you’ve just bought the car and the history is patchy, a mechanical inspection can give you a better starting point.
Symptoms to get checked first
- Engine warning light, limp mode or uneven running. Share any diagnostic report you have. Finding the cause comes before choosing a calibration.
- Clutch slip or unusual shifts. If the revs rise without the expected acceleration, or the automatic gearbox has started shifting harshly, tell us when it happens.
- Recent loss of power or increased smoke. Ask a garage to investigate the change before booking a performance or economy tune.
A remap changes how the engine delivers torque. Existing wear or a fault can affect how the car handles that change. We can advise whether to proceed with the vehicle check or put the tuning enquiry on hold while you investigate. Read our remapping FAQs.
What to tell us before booking
Include the mileage, engine, gearbox, known faults and any modifications. Say where you want the car to feel different, such as responding more promptly on an incline. If your main concern is rising fuel use, start with the cause of the change and use the diesel economy guide to establish a baseline.
For an automatic, mention any changes in shift behaviour even if you’re only asking about an engine remap. Our gearbox tuning guide explains what a separate transmission calibration can change on a compatible car.