Fewer breakdowns.
Better mpg.
Less downtime.
WCH Tuning brings dyno-proven ECU remapping and fault diagnostics straight to your depot across South & West Wales. Rigids, artics and everything in between — tuned and fault-fixed where they're parked, not off-site on a ramp.
What actually happens when we remap your truck?
-13%
+24%
200+
Zero
Every kind of HGV, tuned to how it's actually loaded
Rigid Trucks
Local and regional delivery work — tuned for smoother stop-start driveability and lower fuel spend.
Articulated Lorries
Tractor units tuned for confident pulling power on long-haul and motorway work, fully loaded.
Box Vans & Curtainsiders
Distribution fleet workhorses — tuned for reliability over long, repetitive shift patterns.
Tippers & Grab Lorries
Off-road-capable trucks tuned for torque under heavy, variable loads on site and on the road.
Refrigerated Trucks
Time-critical cold-chain work — tuned and fault-checked so a breakdown doesn't cost a load.
Low Loaders & Recovery
Heavy plant and vehicle transport — tuned for the pulling power these jobs demand.
Five steps. Fitted around your yard, not ours.
Book Your Slot
Tell us your fleet size, makes and models. We quote per vehicle before anything is booked in.
We Come To Your Depot
Daytime, evening or overnight — we work around your operating hours, not the other way round.
Full Diagnostics
Every truck is scanned for existing fault codes and checked as fit to tune before we start.
The Remap
Fuelling, boost and timing maps rewritten per vehicle, based on the routes and loads it actually runs.
Test & Handover
Road tested, maps verified, and a short handover so your engineers know exactly what's changed.
Get Your Fleet Booked
Most single-vehicle remaps are completed in half a day, on-site at your depot.
Get Booked InNot every visit is about more power
High-mileage Euro 6 trucks spend a lot of time fighting AdBlue, DPF and EGR faults. Every warning light is a vehicle at risk of failing a DVSA check or coming off the road — we diagnose the real cause and put it right, at your depot.
AdBlue Solutions
Persistent AdBlue faults, dosing errors and countdown warnings resolved, so a single vehicle doesn't come off the rota.
DPF Solutions
Blocked filters, failed regenerations and repeat DPF fault codes diagnosed and resolved on-site.
EGR Solutions
Sticking or faulty EGR valves causing rough running, power loss or fault codes — diagnosed and resolved at the source.
Fault Code Diagnosis
Full ECU diagnostic scan at your depot to pin down exactly what's triggering a warning light or power reduction.
Sensor & Actuator Faults
Faulty sensors and actuators properly identified and addressed — not just cleared and left to trigger again.
Limp Mode Recovery
Truck stuck in limp mode? We find the root cause and get full power safely restored.
Book a DiagnosticOperators don't get second chances on a missed delivery.
We understand that every truck off the road is a route uncovered or a driver stood down. Every tune and every fault-fix we carry out is built around keeping your fleet moving, not just making one vehicle quicker.
We Come To Your Depot
Full mobile workshop, day or night — no trailering vehicles off-site or losing a service slot elsewhere.
HGV Diesel Specialists
Not a car-tuner doing the odd truck — this is heavy diesel work we do every week, on every major manufacturer.
Euro 6 / O-Licence Safe
Our tunes work within your vehicle's existing emissions systems, so Euro 6 status and O-licence compliance aren't put at risk.
Safe, Reversible Tuning
Every original map is backed up. If a tune ever needs reverting, we can put it back exactly as it was.
Fleet accounts, built for how depots actually run
Multi-Vehicle Pricing
Per-vehicle rates that improve the more of your fleet we tune, with one clear quote up front.
Scheduled Depot Visits
Recurring slots built around your shift patterns, so vehicles are tuned or checked with zero surprises.
Priority Fault Callouts
Existing fleet account holders get priority booking when a vehicle drops into limp mode unexpectedly.
Single Point of Contact
One invoice, one contact, one record of every vehicle we've worked on across your fleet.
From depots and operators across the region
"Fuel savings across the fleet were noticeable within a month. Turned up out of hours and never held up the morning loads."
"Our artics pull hills so much more confidently now, fully loaded. Explained everything clearly before any work started."
"Sorted a recurring AdBlue fault that had cost us a truck off the road for weeks. Should have called sooner."
Mobile across South & West Wales
If you're within reach of these areas, we'll come to you. Based further afield? Get in touch — we regularly travel beyond our core patch for the right job.
