Epynt Tuning - Vehicle Remapping

27/06/2026

Finally got around to giving my own 2021 Toyota GR Yaris the attention it deserved.

After carrying out a full health check and confirming everything was performing exactly as it should, it was time for a Stage 1 ECU calibration.

📈 Performance Gains:
✅ Standard: 261 BHP / 360 Nm
✅ Tuned: 310 BHP / 410 Nm
⬆️ +49 BHP
⬆️ +50 Nm

The result? Sharper throttle response, stronger mid-range pull and a much more exciting drive, all while maintaining excellent drivability for everyday use.

If you're looking to unlock the potential of your performance vehicle, get in touch to see what we can do.

27/06/2026

2020 Renault Trafic 2.0 diesel recovered with a non-start condition caused by the AdBlue countdown reaching zero due to a faulty AdBlue tank level sensor.

📍 Mobile call-out to the customer's location:
✅ Reset the no-start countdown
✅ Applied a professional AdBlue solution to restore vehicle operation
✅ Vehicle back in service with minimal downtime, allowing the customer to continue working

This is a reversible solution, meaning the vehicle can be returned to factory software once the replacement parts are available and fitted.

If your vehicle is suffering from AdBlue faults or a no-start countdown, get in touch to discuss your options.

25/06/2026

Skoda Citigo 1.0 2010

Stock 60bhp 95nm

Tuned 85bhp 105nm

25/06/2026

Vauxhall Corsa 2008 1.3 cdti

Stock 75bhp 170nm
Tuned

20/06/2026

Audi A3 PD170 2007

Stock 170bhp 350nm
Tuned 205bhp 430nm

A customer recently booked their 2008 Audi A3 PD170 in for a performance remap.

As with every vehicle, a full health check and road test were carried out before any tuning work commenced.

During data logging and live data analysis, it became clear that the vehicle's performance was below expected levels.

Further investigation revealed the software had previously been modified to mask underlying faults, including boost control issues.

The DPF had also been disabled in the software, despite the DPF still being physically fitted, resulting in excessive exhaust back pressure.

The vehicle was returned to genuine software to allow proper diagnostics and testing. Fault finding identified a failed N75 boost control valve as the root cause of the underboost condition.

The customer replaced the faulty component and returned a week later for final diagnostics and DPF checks.

✅ N75 valve replaced
✅ Boost control restored
✅ DPF system checked and operating correctly
✅ Vehicle health verified
✅ Performance remap completed

A good example of why we always carry out pre-tuning health checks—fixing the faults first ensures the vehicle performs as it should and allows safe, reliable tuning.

20/06/2026

2010 Kia Santa Fe ECU Bosch EDC17CP14

A recent job completed for a trade customer involved a Kia Santa Fe ECU fitted with the latest tuner protection.

Due to the ECU security, it could not be read via OBD or conventional bench methods, so the unit had to be carefully opened and a direct connection made to the circuit board to establish communication.

✅ ECU stripped
✅ Direct PCB connection made
✅ Data successfully read

Modern ECUs are becoming increasingly secure, requiring specialist equipment and advanced techniques to access them safely.

20/06/2026

2019 Vauxhall Vivaro 1.6 CDTi – DPF/EGR/AdBlue Fault Investigation

This Vivaro came to us with an unusual issue following previous emissions software modifications.

Customer Complaint:
✅ Vehicle drove well
❌ Grey/white smoke once engine reached operating temperature
❌ Symptoms felt very similar to an active DPF regeneration
❌ No fault codes stored

Diagnostic Process:
Rather than simply applying another file and hoping for the best, we carried out a structured investigation:
🔹 Returned ECU to original software
🔹 Checked DPF, EGR and AdBlue system operation
🔹 Reset DPF and aftertreatment learned values
🔹 Investigated regeneration strategies and post-injection behaviour
🔹 Carried out multiple road tests with live data logging
🔹 Monitored exhaust temperature sensors, differential pressure sensors and regeneration status
🔹 Verified calibration behaviour following reprogramming

Findings:
The symptoms were consistent with unwanted aftertreatment activity occurring despite previous software modifications. This resulted in excessive exhaust smoke once the engine was warm.

Rectification:
✔ ECU returned to a known baseline
✔ Aftertreatment adaptations reset correctly
✔ Revised DPF, EGR and AdBlue calibration applied
✔ Vehicle tested and monitored to confirm regeneration-related smoke had been eliminated

Why Diagnostics Matter:
Modern diesel vehicles can suffer from issues that don't always generate fault codes. Accurate diagnosis, data logging and understanding ECU strategies are often far more effective than simply replacing parts.

11/03/2026

22/08/2025

BMW 3 Series 330d 2001

Edc15c4 bench method

Immobiliser solution ✅️