Will removing EGR fail MOT?

Why EGR valve removal is worth it A clogged EGR valve will become stuck in an open or closed position and this can lead to irreversible turbo and engine damage. Due to this, many motorists choose to have EGR valve removal. This is perfectly legal. A car will not fail its MOT because it has had an EGR valve removal.

Should you remove EGR?

Is the EGR valve needed? The answer is no, if you don’t mind breaking the law. Federal emission laws state you are not allowed to tamper with the emission control system on a vehicle, which the EGR is a part of. And since EPA regulations require it, you cannot remove it.

What happens if I block off my EGR valve?

If the EGR valve is clogged or completely blocked off it can longer re-burn harmful emissions in the combustion chamber. The NOx emissions will flow unregulated through the combustion chamber and out of the exhaust pipe. The excessive NOx emissions will show up during a smog test and cause a failure.

What is the purpose of EGR in diesel engine?

Abstract: Exhaust gas recirculation (EGR) is an effective strategy to control NOx emissions from diesel engines. The EGR reduces NOx through lowering the oxygen concentration in the combustion chamber, as well as through heat absorption.

How do I know if my EGR is bad?

What are the symptoms of a failing EGR valve?

Your engine has a rough idle.
Your car has poor performance.
You have increased fuel consumption.
Your car frequently stalls when idling.
You can smell fuel.
Your engine management light stays on.
Your car produces more emissions.
You hear knocking noises coming from the engine.

Is EGR delete illegal UK?

Although it is not illegal to remove the EGR from your vehicle, it is an offence under the Road vehicles (Construction and Use) Regulations (Regulation 61a(3))1 to use a vehicle which has been modified in such a way that it no longer complies with the air pollutant emissions standards it was designed to meet.

Can I block off my EGR valve?