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Fuel Tech Experts FAQ » EGR Valves » EGR Valves FAQ

EGR Valves FAQ

Alex by Alex

Expert answer:

16

Understanding EGR Valves Function Location and Operation

What is an EGR valve?
How does an EGR valve work?
How does EGR work in a diesel engine?
How does EGR work in a petrol/gasoline engine?
How does an EGR cooler work?
How does EGR reduce NOx?
When does an EGR valve open or close?
Where is the EGR valve located?
Where is the EGR sensor or solenoid?
Where does the EGR valve connect?
Are EGR valves necessary?
Which cars have an EGR valve?
Who invented the EGR system?

EGR Valve Delete: Pros, Cons, Legality and Impact

What is an EGR delete?
Why do people delete the EGR valve?
What does an EGR delete do?
What are the pros and cons of an EGR delete?
Will an EGR delete improve fuel economy or horsepower?
Is an EGR delete legal?
Does EGR delete affect the DPF?
Will an EGR delete fail an MOT or emissions test?

EGR Valve Cleaning Maintenance and Replacement Methods Products and Best Practices

What is an EGR cleaner?
Can an EGR valve be cleaned?
Can EGR valves clean themselves?
Where do I spray EGR cleaner?
How much EGR cleaner should I use?
How often can you use EGR cleaner?
Are EGR cleaners any good?
Does EGR cleaner actually work?
Can fuel additives clean the EGR valve?
Can I use EGR cleaner on a MAF sensor or throttle body?
Can you spray EGR cleaner into the turbo or air intake?
How often should an EGR valve be replaced?

Diagnosing and Troubleshooting EGR Valve Problems

Why do EGR valves fail?
What happens if an EGR valve is stuck open or closed?
How to test an EGR valve or EGR cooler?
How to diagnose insufficient EGR flow?
Can an EGR valve cause limp mode?
Can an EGR valve cause black smoke or white smoke?
Can an EGR valve cause loss of power?
Can an EGR valve cause misfire or stalling?
Can an EGR valve cause turbo underboost?
Can a faulty EGR valve cause overheating?
Will a stuck EGR valve stop a car from starting?
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