Diesel-specific checks
Diesel engines that already struggle with soot will not be improved by more fuel. We look at DPF soot and ash loading where the control unit reports it, regeneration history, EGR-related fault codes, boost control and injector-related data where available. A diesel that smokes heavily, lacks power or keeps entering limp mode needs diagnosis before tuning.
Driving pattern matters too. Diesels used mainly for short urban trips may struggle to complete DPF regenerations whether remapped or not, and we will talk about that honestly.
Keeping emissions equipment working
Every road-going diesel remap we carry out keeps the DPF, EGR and SCR/AdBlue systems in place and operating. If one of those systems has a fault, we treat it as a diagnostic job: see DPF diagnostics, EGR diagnostics or AdBlue fault diagnostics.
A missing factory-fitted DPF is an MOT failure, and tampering with emissions controls on a road vehicle can be unlawful. Our remapping and MOT law guide explains the background.
How we approach a diesel remap
We start with suitability rather than a sales pitch. Before any calibration is written to a control unit we want to know the vehicle is healthy: existing fault codes, boost or fuelling problems, a slipping clutch, a worn gearbox or a blocked DPF all need to be dealt with first, because tuning is not a substitute for repair and can make an existing weakness more obvious.
Where the vehicle is supported we explain what the proposed calibration is intended to change, what checks are needed and what the agreed scope of work includes. We do not publish universal power, torque or fuel-economy figures, because results depend on the individual vehicle, its condition, its software and how it is driven. If a remap is not the right answer for your vehicle, we will tell you.
What to send us before booking a diesel remap
The quickest way to get useful advice is to send the registration and a short description by WhatsApp or through the quote form. Support and suitability vary by engine, gearbox, control unit and software version, so a registration lets us check the right information instead of guessing. Any estimate given remotely is provisional until the vehicle has been seen and the required checks are complete.
- 01Vehicle registration and approximate mileage
- 02Make, model and engine size, if known
- 03Any warning lights, messages, symptoms or fault codes
- 04Existing remaps, tuning boxes or hardware modifications
- 05How the vehicle is used — commuting, towing, short trips or heavy loads
- 06Whether the vehicle is currently in limp mode or will not start
Visiting the workshop for a diesel remap
All work is carried out at our single workshop at Unit 2, Lancaster Works, Kingsbridge Road, Manchester M9 5SP. We do not run a mobile remapping service and we have no other branches, so every a diesel remap enquiry is booked into the same Manchester workshop. Visits are by arrangement: please call or WhatsApp before travelling so we can confirm the vehicle, the time and what the visit will involve.
Access is through the black gate. Call when you arrive so we can let you in, then keep left towards the rear of the site. We are open Monday to Friday 8am–6pm and Saturday 8am–1pm, and closed on Sunday. If the vehicle is in limp mode, showing a serious warning or will not start, tell us before setting off so we can talk about whether it is sensible to drive it or whether transport should be arranged.