Fuel, AdBlue, EGR & emissions
Restore the system. Find the cause.
Warning lights, difficult starting and reduced power can have several causes. We investigate fuel delivery and emissions-system operation, explain the evidence and agree a repair that restores the system.
Find what you need.
Choose a topic, or read the full guide below.
Start with the symptoms.
Tell us the exact dashboard message, whether the fault is intermittent and what happened before it appeared. Recent fuel purchases, repairs, AdBlue top-ups and previous diagnostic reports can help establish the next useful test.
If the vehicle has been misfuelled, do not start or continue running it. Contact reception to agree workshop acceptance and any third-party recovery arrangements.
- AdBlue countdowns and SCR warnings
- Recurring engine lights, limp mode and poor starting
- Misfire, fuel pressure and consumption concerns
Repair—not removal of protection.
Our repair scope includes AdBlue tanks, pumps, heaters, dosing injectors and NOx sensors; EGR valves and coolers; petrol EVAP faults; and GPF/OPF or catalytic-converter investigations. The aim is correct operation, not disabling emissions equipment.
Diesel additive systems such as Eolys are separate from AdBlue and require the correct fluid, components and supported reset procedure.
- Identify the affected circuit and underlying cause
- Check contamination, leaks and associated components
- Use suitable vehicle-specific repair procedures
From supply pressure to injector performance.
We offer diesel leak-off testing, supported high-pressure pump investigations and selected injector testing or refurbishment. Petrol direct-injection pumps, low-pressure pumps, senders and controllers are also within scope.
Injector type and repairability determine the available route. A fault code alone is not proof that an injector needs replacement.
- Fuel delivery and pressure checks
- Selected injector cleaning and flow testing
- Workshop contamination clean-up after assessment
Agree the next step before buying parts.
Supply your registration, mileage, warning messages and any previous findings. We use an initial one-hour diagnostic allowance; further investigation is agreed separately. Diagnostic charges are not deducted from subsequent repair costs.
- Pricing is specific to the vehicle
- Additional strip-down may be needed
- Findings and repair options explained
Questions are welcome
Not sure where to start?
Tell us the vehicle and what you need. We will help you find the right route.
Workshop capability / Vulcan Motors
More ways we can help.
Specific services, practical limits and a clear next step. Every job is assessed for the vehicle, condition, access and suitable parts. Tell us your registration and what you need.
Fuel & emissions repairs
Fuel delivery, AdBlue, EGR, sensors and emissions-system repairs.
AdBlue/SCR fault diagnosis and repair
AdBlue tanks, pumps, heaters and level sensors
AdBlue dosing-injector and crystallisation repairs
NOx sensor diagnosis and replacement
EGR valve and cooler cleaning/replacement
GPF/OPF diagnosis and replacement
Catalyst efficiency investigation and replacement
Petrol EVAP purge-valve and vapour-leak faults
Diesel high-pressure pump testing/repair
Workshop fuel-system decontamination after misfuelling or pump failure
Inlet swirl-flap and runner-actuator repairs
Throttle-body cleaning, replacement and supported relearning
Diesel injector leak-off testing
Petrol direct-injection high-pressure pump diagnosis/replacement
Low-pressure pumps, senders and pump controllers
Glow-plug control modules and circuits
Vacuum leaks and vacuum-operated actuators
Diesel fuel-additive systems including Eolys
Turbo boost-control solenoids, vacuum controls and wastegates
Turbo actuator replacement where approved procedures permit
Only where an approved vehicle-specific procedure permits.
Turbo oil-feed/return pipes and failure-cause investigation
Conventional intake-manifold cleaning
Selected petrol injector cleaning and flow testing
Selected types; no claim that specialist injector testing is performed in-house.
Selected injector testing and refurbishment
Type and repairability checked.
Diesel anti-shudder/shut-off valve diagnosis and replacement
Fuel-filler vent and tank-breathing faults
Rigid and flexible fuel-line replacement
Diesel fuel filter housing, primer and air-ingress repairs
Diesel fuel heater and water-in-fuel sensor repairs
Exhaust gas temperature sensor diagnosis and replacement
Lambda/oxygen sensor testing, replacement and circuit repairs
Petrol secondary air-injection pump, valve and pipe repairs