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Knowledge Base

EGR

Everything about the EGR (Exhaust Gas Recirculation) valve: what it does, why it clogs with soot over time and how EGR faults affect running and economy.

EGR guides

EGR Valve Symptoms: Rough Idle, Limp Mode and Poor MPG
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EGR Valve Symptoms: Rough Idle, Limp Mode and Poor MPG

A sticking EGR valve causes some of the most common diesel running problems. Here are the symptoms to recognise and what is really going on.

6 min readRead
EGR Cooler Faults Explained
EGR16 reads

EGR Cooler Faults Explained

The EGR cooler is a less-known part of the emissions system — but when it fails it can cause overheating, coolant loss and white smoke. Here is what to know.

5 min readRead
EGR Valve Problems and How We Fix Them
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EGR Valve Problems and How We Fix Them

A faulty EGR valve causes rough running, limp mode and poor economy. Here are the solutions we offer to put it right.

6 min readRead
Keeping Your EGR Healthy: Prevention Tips
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Keeping Your EGR Healthy: Prevention Tips

EGR faults come from soot build-up over time. Here is how everyday driving and maintenance help keep it working.

5 min readRead
The EGR Valve Explained: Soot, Carbon and Running Faults
EGR20 reads

The EGR Valve Explained: Soot, Carbon and Running Faults

The EGR valve recirculates exhaust gas to lower emissions, but it can carbon up over time and affect running and economy. Here is how it works and how we solve it.

5 min readRead

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Browse the rest of our Knowledge Base for honest, jargon-free guidance.

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AdBlue, SCR and NOx systems on modern diesels.

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Performance & Economy

Power, torque, fuel economy and towing.

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Tuning Advice

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