Performance
Diagnostics
£40–50
Performance
EGR delete
An EGR delete is a software change that stops the ECU using the exhaust gas recirculation valve, and it is off-road, motorsport or export work only. A road car with a sticking valve wants the valve itself dealt with.
What an EGR delete is
The EGR valve feeds a measured amount of exhaust gas back into the engine's intake to lower combustion temperatures. Soot builds up around it over time, and a valve that sticks or clogs gives rough running, a warning light, and often limp mode.
A delete is a recalibration so the ECU stops asking the valve to operate. It is software only: no blanking plate, nothing unbolted, and the valve stays fitted to the engine. All of that describes the job. None of it is a reason the vehicle would pass an inspection, and none of it changes where the vehicle can be used.
It does not clean or repair the valve either. The soot is still there and the valve is still stuck. So the work is offered only for vehicles that are not driven on public roads.
Who this is for
Competition and track vehicles that stay off public roads, off-road machinery, and vehicles being exported to markets with different rules. Those are the limits, and we will ask where your vehicle sits before agreeing to the work.
If your car is a road car with a rough idle and an engine light, this is not your answer. A clogged EGR valve can be cleaned, and a failed one can be replaced, and both of those keep the car road legal. We would sooner do that job than this one.
Either way, start with diagnostics. Rough running and limp mode have a long list of possible causes, and the EGR valve is only one of them. Reading the codes stops you paying to fix something that was working fine.
How we do it
We begin with what the vehicle is and how it gets used. The answer decides whether the job goes ahead, so be straight with us. If you describe a car that is taxed and driven daily, we will tell you plainly that this is not the service you want.
We run a diagnostics check before anything is written. If the car has a fault, tuning on top of it hides the fault rather than fixing it, so we deal with that first or we don't proceed.
The calibration is written on dealer-level tools rather than a generic cable, and nothing is taken off the engine. The vehicle is then run and checked before it leaves, because a file that works on the laptop still has to work on the engine.
Every job runs on a 100-amp battery support unit. Voltage dropping mid-write is how ECUs get bricked, and it is the single most common way a cheap remap goes wrong.
You can have a USB backup of your original file, so the car can be put back to how it left the factory whenever you want.
What's included
- A conversation about how the vehicle is used, before anything is agreed
- A diagnostics check to confirm the EGR valve is the problem
- Software-only calibration on dealer-level tools, with no parts removed and no blanking plate
- A 100-amp battery support unit on the vehicle throughout
- A USB backup of your original file, so the vehicle can be put back to factory settings
- Testing on the vehicle before it goes back to you
Why us for this
The work happens at our own unit at 85 Bogmoor Road in Glasgow, across from the Shieldhall test centre. Writing to an ECU is workshop work with the vehicle properly supported, not something to do on a driveway.
The work is done by an IMI-approved technician trained by The OBD Company, on dealer-level tools rather than a generic cable.
The diagnostics come first either way. If the check says the valve can be cleaned or replaced, we will tell you that, because on a road car it is the route that keeps the vehicle legal.
Common questions
Can I have this done on my road car?
No. It is offered strictly for off-road, motorsport or export vehicles. For a car used on public roads we would look at cleaning or replacing the EGR valve instead.
Will the car still pass an MOT?
Removing or disabling emissions equipment is not road legal in the UK, and the MOT includes emissions checks. Keeping a vehicle compliant is the owner's responsibility, and nothing about this work assists with that.
Can the EGR valve be cleaned or replaced instead?
Often yes. Soot build-up is the usual cause and a clogged valve can frequently be cleaned, while a failed one can be replaced. On a car that is driven on the road, look at that first.
Is a blanking plate fitted?
No. This is a software change with nothing removed and nothing added to the engine. That describes the work; it does not alter the position on road use.
Will it make the car quicker?
That is not what this work is for. No calibration does the same thing to two different engines, so we will not put a number on your car without seeing it. If power is what you are after, a remap is the page you want.
Can it be put back to standard?
Yes, with the USB backup of your original file. Writing that file back returns the ECU to how it left the factory.
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Let's get you a price
Tell us what you drive and what you want done to it. We will come back with a price for your car, not a range off a chart.