Member Since: 12 Apr 2015
Location: sunny essex
Posts: 762
question regarding blanked egr valves
afternoon all I need an expert to answer a question for me please
was talking to my mot guy other day and the topic of egr's came up, when I said I had blanked mine he said that's not good for the turbo as when you lift off the throttle the boost pressure has nowhere to go as they have no dump/diverter valve in the system and would normally release through the egr valve
I didn't say much to be honest as im not sure if he is right or having removed the butterfly from the throttle body im right, thoughts below please thanks for all repliesplease excuse any grammer/punctuation mistakes,i'm thick,thankyou
current vehicles 2005 d3 2013 d4
19th Aug 2019 5:19 pm
Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10360
I wouldn't worry.
I doubt the EGRs are open with foot off throttle anyway. So no difference
19th Aug 2019 5:58 pm
eightfoot
Member Since: 12 Apr 2015
Location: sunny essex
Posts: 762
isn't that the whole point of the egr's there open when throttle off to cycle the gasses through the exhaustplease excuse any grammer/punctuation mistakes,i'm thick,thankyou
current vehicles 2005 d3 2013 d4
19th Aug 2019 6:13 pm
Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10360
I thought they open at part throttle when you don’t care the engine is being feed crap
19th Aug 2019 7:03 pm
aja4x4
Member Since: 14 Apr 2019
Location: Westbury
Posts: 2459
If you look on the side of your turbo your find the actuator that controls the pressure by allowing the exhaust gases to bypass the turbo or altering the variable vanes so that the gases have no effect on the turbine.
Egr valves open on overun with the throttle closed, a turbo will only reach maximum boost with the throttle open so they cant use a egr as a dump valve.
20th Aug 2019 9:05 am
Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10360
EGR Opens when the engine is warm and under cruising conditions
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