WebDec 28, 2024 · You will know if you have a bad EGR valve that warrants a replacement when it fails to open when you apply the vacuum pump to it. You can also test your EGR valve by using a vacuum gauge. To do this method, you will have to follow these steps. Do this method with a cold engine. Do not try to warm it. Jan 7, 2016 ·
Symptoms of a Bad Air Injection Check Valve - In The Garage with ...
WebMay 21, 2024 · 1. Rough Idling. You might experience your Duramax engine revving up abnormally when you start the vehicle or put it on idle for some time. If the rev goes up automatically, it is probably because of an open EGR valve. Due to the free flow of the exhaust gas to the intake, the engine will rev more than usual. 2. WebSymptoms of a bad EGR valve include: rough idling or stalling a smell of fuel increased fuel consumption pinging, tapping, or knocking sounds failed smog test Check Engine Light on … lyon township senior living
11 Common 6.6 LLY Duramax Problems And How To Fix Them
WebJun 28, 2009 · 334 Posts. #2 · Jun 27, 2009. If the EGR cooler is leaking generally the valve has wet sludge on it. One way to see if the cooler is leaking is to park the truck facing down hill or jack the rear up and any coolant will run forward and you can see it … WebJul 17, 2024 · If an EGR valve is stuck open, it creates a vacuum leak, with the only difference being that instead of air, it's the exhaust gases that enter the intake manifold. A stuck-open EGR valve causes the same symptoms as vacuum leaks. Often, problems with an EGR valve that is stuck open are more noticeable after driving on the highway. WebJul 7, 2024 · 6.0 Powerstroke bad EGR valve symptoms 1. Poor engine performance 2. Rough idle 3. Check engine light 4. Odor of fuel 5. Emissions test 6. Knocking sound How do I know if my 6.0 EGR valve is bad? When the EGR valve goes bad what happens? What should you Do When 6.0 Powerstroke EGR Valve Fail? 1. Error code P0402 2. Error code … lyon township roscommon county mi