EGR Valve question
Thread Starter
Instructor
Joined: Sep 2009
Posts: 192
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From: Yukon OK
EGR Valve question
I just purchased an 86 coupe and it has a very bad leak in the EGR valve. The previous owner tried to "fix" the problem as you can see in this photo. I beleive that this is causing the car to idle roughly at times. Also, the AIR pump has already been removed and there are no inspections where I live. Am I better off replacing the Valve or just eliminating it?
Thread Starter
Instructor
Joined: Sep 2009
Posts: 192
Likes: 0
From: Yukon OK
Le Mans Master
Joined: Aug 2007
Posts: 8,735
Likes: 412
From: WV
Thats it, if this is leaking it will cause it to idle poorly..I don't think the repair that I see in the picture is going to be airtight so thats probably your problem..The EGR helps by allowing recirculated air into the combustion chamber that reduces temps by as much as 500 degrees. Without it the car can experience timing ping and performance reduction..My advice is if you can , keep the EGR functional...WW
Last edited by WW7; Nov 1, 2009 at 05:37 PM.
Le Mans Master
Joined: Feb 1999
Posts: 6,470
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From: levittown pa. usa Even a bad day with my `Vette, is better than a good day at work
St. Jude Donor '10
Le Mans Master
Joined: Jul 2007
Posts: 5,043
Likes: 8
From: Tampa Florida
Here is a tip that may get you by until your new pipe arrives.
Basically this is a thin piece of aluminum which was cut/sheared to the same shape as one of the riser/pipe gaskets (except for the center hole of course) that go on each end of the EGR pipe (pipe in the above picture). Holes were punched where the mounting hardware goes....use one of your existing gaskets as a templet. This is basically a D.I.Y. EGR block off plate that mounts between the existing EGR manifold riser and the existing EGR pipe....you do still need to use the existing gaskets also. No exaust gets up into the riser at all with this puppy in place. Great piece for quick testing of possible "stuck open" EGR issues.....doesn't generate a trouble code either.
Top Side:
Bottom Side:
Basically this is a thin piece of aluminum which was cut/sheared to the same shape as one of the riser/pipe gaskets (except for the center hole of course) that go on each end of the EGR pipe (pipe in the above picture). Holes were punched where the mounting hardware goes....use one of your existing gaskets as a templet. This is basically a D.I.Y. EGR block off plate that mounts between the existing EGR manifold riser and the existing EGR pipe....you do still need to use the existing gaskets also. No exaust gets up into the riser at all with this puppy in place. Great piece for quick testing of possible "stuck open" EGR issues.....doesn't generate a trouble code either.
Top Side:
Bottom Side:
Last edited by engle1147; Nov 1, 2009 at 10:27 PM.
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Pro
Joined: Mar 2008
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From: High Bridge New Jersey
Yes
Thats it, if this is leaking it will cause it to idle poorly..I don't think the repair that I see in the picture is going to be airtight so thats probably your problem..The EGR helps by allowing recirculated air into the combustion chamber that reduces temps by as much as 500 degrees. Without it the car can experience timing ping and performance reduction..My advice is if you can , keep the EGR functional...WW
