EGR valve - Disconnect?

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lesnajair
Posts: 33
Joined: 24 Aug 2002, 06:02

EGR valve - Disconnect?

Post by lesnajair » 23 Jul 2005, 04:07

Hi All
Is it best to disconnect this or leave it alone?
The reason I ask is because I have been getting poor performance, eg. decrease in mpg and poor acceleration, lack of power.
Would this help my symptoms or am I looking at the wrong remedy?
Any advice is always greatly appreciated.
Les

wheeler
Posts: 3825
Joined: 21 Sep 2002, 19:07
x 84

EGR valve - Disconnect?

Post by wheeler » 23 Jul 2005, 05:37

what car & engine ?

macaroni
Posts: 301
Joined: 24 Sep 2003, 13:35

EGR valve - Disconnect?

Post by macaroni » 26 Jul 2005, 14:07

On any car, best to disconnect it, except for MOT time.
I had a 406 2.1td and the inlet manifold was caked in gunk and I was told it was due to the EGR system. I disconnected mine and cleaned out the inlet manifold a) by hand and b) with 10K boost and the car was much better.

lesnajair
Posts: 33
Joined: 24 Aug 2002, 06:02

EGR valve - Disconnect?

Post by lesnajair » 28 Jul 2005, 05:53

Sorry, forgot to say - 1.9 lstd estate s reg!
Les
p.s. what do you mean by '10K' boost?

User avatar
Kowalski
Posts: 2557
Joined: 15 Oct 2003, 17:41

EGR valve - Disconnect?

Post by Kowalski » 28 Jul 2005, 06:19

Do you have to take the manifold off to clean it or can it be cleaned succesfully in situ?

macaroni
Posts: 301
Joined: 24 Sep 2003, 13:35

EGR valve - Disconnect?

Post by macaroni » 28 Jul 2005, 15:07

On the 2.1td, the manifold is in 2 halves, a plastic top half which can easily be removed and cleaned and the alloy bottom half, which can't. For that I used a can of 10K boost. This is some stuff that does the job of injector cleaner, but for the air inlet tracts of a car. On very gunked up cars, that have done loads of town driving etc, it can work wonders. It probably didn't do much for my car as I thrashed it anyway and cleaned deposits out that way. Shouldn't do any harm though. You spray it into the inlet pipe after the air cleaner whilst revving the engine. You shoudl see clouds of smoke come out of the exhaust (so don't do it in your neighbourhood!) and hopefully, black soot.