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Old 03-16-2011, 01:29 PM   #39 (permalink)
Mario_Marques
Euro Golf 4 TDI s.e.
 
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Join Date: Dec 2010
Location: Portugal(Europe)
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Golf4 tdi "115" - '01 VW Golf TDI Sport Edition
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Quote:
Originally Posted by COcyclist View Post
Thanks Mario, I have been trying to find this out for myself due to problems with a U.S. EGR cooler recall. From what I can find it is better to leave the EGR intact for lowest fuel consumption.
Is better to keep it clean instead of removing it.
Fuel consumption increases a little when you delete your egr because when egr is open, turbo pressure drops down & maf readings, maf is the "thing" who gives your car the information to inject more or less fuel, more air, more fuel.
You can see this by yourself in vag-com, you can do the egr test and see how it changes the amount of air into the engine, in this test you can also see how is your vnt turbo system working, my car doesent have egr, in cars without egr, this test dont work.
The negative side of having a egr is that your intake will get clogged, when this happen you will loose performance and your fuel consumption will increase, so the ideia is keep it clean.
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COcyclist (03-16-2011)